diff --git a/css/dropdown.scss b/css/dropdown.scss
index 812cf11..1ef27a0 100644
--- a/css/dropdown.scss
+++ b/css/dropdown.scss
@@ -161,7 +161,7 @@ $listMaxHeight: 210px;
         }
     }
 
-    >.dropdown-panel {
+    >.dropdown-box {
         position: absolute;
         visibility: hidden;
         opacity: 0;
diff --git a/css/grid.scss b/css/grid.scss
index e235ea6..8e0e83a 100644
--- a/css/grid.scss
+++ b/css/grid.scss
@@ -64,7 +64,7 @@
     &,
     input[type="text"],
     .dropdown-wrapper>.dropdown-header>.dropdown-text,
-    .dropdown-wrapper>.dropdown-panel>.dropdown-list {
+    .dropdown-wrapper>.dropdown-box>.dropdown-list {
         font-size: var(--font-size);
     }
 
@@ -283,7 +283,7 @@
                             }
                         }
 
-                        >.dropdown-panel {
+                        >.dropdown-box {
                             top: calc(var(--line-height) + 2px);
 
                             &.slide-up {
diff --git a/lib/app.js b/lib/app.js
new file mode 100644
index 0000000..4969f8e
--- /dev/null
+++ b/lib/app.js
@@ -0,0 +1,5 @@
+import CustomerCommunication from "./app/communications/customer";
+
+export {
+    CustomerCommunication
+}
\ No newline at end of file
diff --git a/lib/app/communications/customer.d.ts b/lib/app/communications/customer.d.ts
new file mode 100644
index 0000000..373e88b
--- /dev/null
+++ b/lib/app/communications/customer.d.ts
@@ -0,0 +1,28 @@
+interface CheckboxConfig {
+    checked: boolean
+    onchanged: (flag: boolean) => void
+}
+
+interface InitConfig {
+    autoUpdates?: CheckboxConfig;
+    statusLink?: CheckboxConfig;
+    readonly?: boolean;
+}
+
+export class CustomerCommunication {
+    get autoUpdatesEnabled(): boolean;
+    set autoUpdatesEnabled(enabled: boolean);
+    get autoUpdates(): boolean;
+    set autoUpdates(checked: boolean);
+
+    get statusLinkEnabled(): boolean;
+    set statusLinkEnabled(enabled: boolean);
+    get statusLink(): boolean;
+    set statusLink(checked: boolean);
+
+    create(): HTMLElement;
+}
+
+declare var CustomerCommunication: {
+    new(opt: InitConfig): CustomerCommunication
+}
\ No newline at end of file
diff --git a/lib/app/communications/customer.js b/lib/app/communications/customer.js
new file mode 100644
index 0000000..967616d
--- /dev/null
+++ b/lib/app/communications/customer.js
@@ -0,0 +1,226 @@
+import "./style.scss";
+import { createElement, createElementInit } from "../../functions";
+import { r } from "../../utility/lgres";
+import { isEmail, isPhone } from "../../utility";
+import { setTooltip } from "../../ui/tooltip";
+import { createIcon } from "../../ui/icon";
+import { createCheckbox } from "../../ui/checkbox";
+import { createBox } from "./lib";
+
+class CustomerCommunication {
+    #container;
+    #option;
+    #contacts;
+    #followers;
+    #enter;
+    #message;
+
+    constructor(opt) {
+        this.#option = opt ?? {};
+    }
+
+    get #autoUpdates() { return this.#container.querySelector('.check-auto-update>input') }
+    get autoUpdatesEnabled() { return this.#autoUpdates?.disabled !== true }
+    set autoUpdatesEnabled(flag) {
+        const element = this.#autoUpdates;
+        element != null && (element.disabled = flag === false);
+    }
+    get autoUpdates() { return this.#autoUpdates?.checked }
+    set autoUpdates(flag) {
+        const element = this.#autoUpdates;
+        element != null && (element.checked = flag);
+    }
+
+    get #statusLink() { return this.#container.querySelector('.check-status-link') }
+    get statusLinkEnabled() { return this.#statusLink?.disabled !== true }
+    set statusLinkEnabled(flag) {
+        const element = this.#statusLink;
+        element != null && (element.disabled = flag === false);
+    }
+    get statusLink() { return this.#statusLink?.checked }
+    set statusLink(flag) {
+        const element = this.#statusLink;
+        element != null && (element.checked = flag);
+    }
+
+    get text() { return this.#enter?.value }
+    set text(s) {
+        const element = this.#enter;
+        element != null && (element.value = s);
+    }
+
+    get contacts() {
+        return [...this.#contacts.children].map(el => {
+            const span = el.querySelector('span');
+            return { 'Key': span.innerText, 'Value': span.dataset.name };
+        });
+    }
+    set contacts(contacts) {
+        this.#contacts.replaceChildren();
+        if (contacts?.length > 0) {
+            for (let c of contacts) {
+                if (c.OptOut || c.OptOut_BC) {
+                    continue;
+                }
+                const mp = String(c.MobilePhone).trim();
+                const email = String(c.Email).trim();
+                if (c.ContactPreference === '0' && !isPhone(mp) ||
+                    c.ContactPreference === '1' && !isEmail(email)) {
+                    continue;
+                }
+                const to = c.ContactPreference === '0' ? mp : email;
+                this.#contacts.appendChild(
+                    createElement('div', 'contact-item',
+                        createIcon('fa-light', c.ContactPreference === '0' ? 'comment-lines' : 'envelope'),
+                        createElementInit('span', span => {
+                            span.dataset.name = c.Name;
+                            span.innerText = to;
+                        })
+                    )
+                )
+            }
+        }
+    }
+
+    create() {
+        // functions
+        const checkAutoUpdate = createCheckbox({
+            className: 'check-auto-update',
+            checked: this.#option.autoUpdates?.checked,
+            enabled: this.#option.autoUpdates?.enabled,
+            checkedNode: createIcon('fa-regular', 'redo-alt'),
+            uncheckedNode: createIcon('fa-regular', 'ban'),
+            onchange: () => {
+                setTooltip(checkAutoUpdate, this.checked ?
+                    r('autoUpdateEnabled', 'Auto Updates Enabled') :
+                    r('autoUpdateDisabled', 'Auto Updates Disabled'));
+                if (typeof this.#option.autoUpdates?.onchanged === 'function') {
+                    this.#option.autoUpdates.onchanged(this.checked);
+                }
+            }
+        });
+        const checkLink = createCheckbox({
+            className: 'check-status-link',
+            checked: this.#option.statusLink?.checked,
+            enabled: this.#option.statusLink?.enabled,
+            checkedNode: createIcon('fa-regular', 'link'),
+            uncheckedNode: createIcon('fa-regular', 'unlink'),
+            onchange: () => {
+                setTooltip(checkLink, this.checked ?
+                    r('statusLinkIncluded', 'Status Link Included') :
+                    r('statusLinkExcluded', 'Status Link Excluded'));
+                if (typeof this.#option.statusLink?.onchanged === 'function') {
+                    this.#option.statusLink.onchanged(this.checked);
+                }
+            }
+        });
+        const container = createBox(
+            createElement('div', null,
+                createElementInit('div', div => div.innerText = r('messages', 'Customer Communication')),
+                createElementInit('div', div => div.innerText = consts.user?.companyName)),
+            [
+                setTooltip(checkAutoUpdate, r('autoUpdateDisabled', 'Auto Updates Disabled')),
+                setTooltip(checkLink, r('statusLinkExcluded', 'Status Link Excluded'))
+            ]
+        );
+        // contacts
+        const contacts = createElement('div');
+        container.append(
+            createElement('div', 'contact-bar',
+                createIcon('fa-solid', 'user-circle', {
+                    'fill': 'lightgray',
+                    'flex': '0 0 auto'
+                }),
+                createElementInit('div', div => div.style.flex = '1 1 auto',
+                    contacts,
+                    createElementInit('button', button => {
+                        button.className = 'roundbtn';
+                        button.style.backgroundColor = 'rgb(1, 199, 172)';
+                        button.appendChild(createIcon('fa-solid', 'user-edit'));
+                        setTooltip(button, r('editContacts', 'Edit Contacts'));
+                        button.addEventListener('click', () => {
+                            // TODO:
+                        });
+                    })
+                )
+            )
+        );
+        this.#contacts = contacts;
+        // followers
+        const followers = createElement('div');
+        container.append(
+            createElement('div', 'contact-bar follower-bar',
+                createIcon('fa-solid', 'user-tag', {
+                    'fill': '#fff',
+                    'background-color': 'lightgray',
+                    'box-sizing': 'border-box',
+                    'border-radius': '15px',
+                    'padding': '4px',
+                    'flex': '0 0 auto'
+                }),
+                createElementInit('div', div => div.style.flex = '1 1 auto',
+                    followers,
+                    createElementInit('button', button => {
+                        button.className = 'roundbtn';
+                        button.style.backgroundColor = 'rgb(48, 107, 255)';
+                        button.appendChild(createIcon('fa-solid', 'pen'));
+                        setTooltip(button, r('editFollower', 'Edit Followers'));
+                        button.addEventListener('click', () => {
+                            // TODO:
+                        });
+                    })
+                )
+            )
+        );
+        this.#followers = followers;
+        // enter box
+        const enter = createElement('textarea');
+        enter.placeholder = r('typeComment', 'Enter Message Here');
+        enter.maxLength = 3000;
+        this.#enter = enter;
+        container.appendChild(
+            createElement('div', 'message-bar',
+                enter,
+                createElementInit('div', div => div.style.textAlign = 'right',
+                    createElementInit('button', button => {
+                        button.className = 'roundbtn';
+                        button.style.backgroundColor = 'rgb(19, 150, 204)';
+                        button.appendChild(createIcon('fa-solid', 'paper-plane'));
+                        setTooltip(button, r('sendMessage', 'Send Message'));
+                        button.addEventListener('click', () => {
+                            // TODO: Add text
+                        })
+                    })
+                )
+            )
+        );
+
+        const message = createElement('div');
+        this.#message = message;
+        container.appendChild(message);
+        return this.#container = container;
+    }
+
+    load(data, contacts) {
+        const children = [];
+        if (data?.length > 0) {
+            for (let comm of data) {
+                const div = document.createElement('div', 'txtdiv');
+                let name;
+                if (comm.IsReply) {
+                    const email = isEmail(comm.Sender);
+                    const c = contacts.find(c => email ?
+                        c.Email === comm.Sender :
+                        c.MobilePhone === comm.Sender);
+                    if (c != null) {
+                        name = c.Name;
+                    }
+                }
+            }
+            children[0].style.marginTop = '0';
+            this.#message.append(...children);
+        }
+    }
+}
+
+export default CustomerCommunication;
\ No newline at end of file
diff --git a/lib/app/communications/lib.d.ts b/lib/app/communications/lib.d.ts
new file mode 100644
index 0000000..a08b025
--- /dev/null
+++ b/lib/app/communications/lib.d.ts
@@ -0,0 +1 @@
+export function createBox(title: HTMLElement, functions: HTMLElement[]): HTMLElement
\ No newline at end of file
diff --git a/lib/app/communications/lib.js b/lib/app/communications/lib.js
new file mode 100644
index 0000000..41fedfb
--- /dev/null
+++ b/lib/app/communications/lib.js
@@ -0,0 +1,15 @@
+import { createElement, createElementInit } from "../../functions";
+
+function createBox(title, functions) {
+    const container = createElement('div', 'comm');
+    const header = createElement('div', 'title-bar',
+        title,
+        createElement('div', 'title-functions', ...functions)
+    );
+    container.appendChild(header);
+    return container;
+}
+
+export {
+    createBox
+}
\ No newline at end of file
diff --git a/lib/app/communications/style.scss b/lib/app/communications/style.scss
new file mode 100644
index 0000000..c93c36c
--- /dev/null
+++ b/lib/app/communications/style.scss
@@ -0,0 +1,242 @@
+:root {
+    --dark-fore-color: #fff;
+    --dark-fore-opacity-color: rgba(255, 255, 255, .6);
+    --title-color: #fff;
+    --title-bg-color: rgb(68, 114, 196);
+    --strong-color: #333;
+    --medium-font-size: .875rem;
+}
+
+.comm {
+    display: flex;
+    flex-direction: column;
+    width: 320px;
+    background-color: var(--dark-fore-color);
+    border: 1px solid var(--title-bg-color);
+
+    .roundbtn {
+        width: 30px;
+        height: 30px;
+        display: inline-block;
+        box-sizing: border-box;
+        cursor: pointer;
+        padding: 7px;
+        margin-left: 10px;
+        fill: var(--dark-fore-color);
+        border-radius: 15px;
+        border: none;
+        outline: none;
+        transition: background-color .2s;
+        user-select: none;
+
+        &:hover {
+            background-color: var(--dark-fore-opacity-color);
+
+            >svg {
+                opacity: .6;
+            }
+        }
+
+        &.disabled {
+            fill: lightgray;
+            background-color: transparent !important;
+
+            &:hover {
+                opacity: unset;
+            }
+        }
+
+        >svg {
+            width: 13px;
+            height: 14px;
+            display: block;
+            transition: opacity .2s;
+        }
+    }
+
+    .image-check-box {
+        user-select: none;
+
+        >input[type="checkbox"] {
+            display: none;
+
+            &:checked~.unchecked {
+                display: none;
+            }
+
+            &:checked~.checked {
+                display: unset;
+            }
+        }
+
+        >.unchecked {
+            opacity: .5;
+        }
+
+        >.checked {
+            display: none;
+        }
+    }
+
+    .title-bar {
+        flex: 0 0 auto;
+        padding: 5px 0 5px 10px;
+        color: var(--title-color);
+        background-color: var(--title-bg-color);
+        line-height: 24px;
+        display: flex;
+        align-items: center;
+
+        >div {
+            flex: 1 1 auto;
+        }
+
+        >.title-functions {
+            flex: 0 0 auto;
+            display: flex;
+
+            >label {
+                margin: 0 4px;
+                box-sizing: border-box;
+                cursor: pointer;
+                width: 30px;
+                height: 30px;
+                background-color: var(--dark-fore-color);
+                border-radius: 15px;
+                display: flex;
+                align-items: center;
+                justify-content: center;
+                transition: background-color .2s;
+
+                >svg {
+                    fill: var(--strong-color);
+                    width: 14px;
+                    height: 14px;
+                    transition: opacity .2s;
+                }
+
+                &:hover {
+                    background-color: var(--dark-fore-opacity-color);
+
+                    >svg {
+                        opacity: .6;
+                    }
+                }
+            }
+        }
+    }
+
+    .contact-bar {
+        flex: 0 0 auto;
+        padding: 4px 0;
+        display: flex;
+        border-bottom: 1px solid var(--title-bg-color);
+
+        >svg {
+            width: 30px;
+            height: 30px;
+            margin: 0 8px;
+        }
+
+        .contact-item {
+            display: flex;
+            align-items: center;
+            line-height: 22px;
+
+            >svg {
+                flex: 0 0 auto;
+                width: 16px;
+                height: 16px;
+                margin-right: 6px;
+                fill: var(--strong-color);
+            }
+
+            >span {
+                flex: 1 1 auto;
+                color: var(--strong-color);
+                font-size: var(--medium-font-size);
+            }
+        }
+
+        .roundbtn {
+            float: right;
+            margin: 4px 10px 10px;
+
+            >svg {
+                width: 16px;
+            }
+        }
+    }
+
+    .message-bar {
+        flex: 0 0 auto;
+        border-bottom: 1px solid var(--title-bg-color);
+        display: flex;
+        flex-direction: column;
+
+        >textarea {
+            padding: 10px 10px 0;
+            border: none;
+            height: 70px;
+        }
+
+        >div {
+            padding: 0 10px 10px;
+        }
+
+        &+div {
+            flex: 1 1 auto;
+            overflow: auto;
+            margin-top: 8px;
+
+            .msgdiv {
+                margin-top: 5px;
+                border-bottom: solid 1px lightgray;
+                padding: 3px 10px 5px;
+                line-height: 1.5rem;
+                white-space: normal;
+                word-break: break-word;
+                overflow: hidden;
+                font-size: .8125rem;
+                color: #333;
+
+                &:last-child {
+                    border-bottom: none;
+                }
+            }
+
+            .msgposter {
+                font-weight: bold;
+
+                &+div {
+                    line-height: 1.2rem;
+                    padding: 8px 20px;
+                    background-color: rgb(244, 244, 244);
+                    border-radius: 5px;
+                    white-space: pre-wrap;
+                    text-align: left;
+                    word-break: break-word;
+
+                    &.txtself {
+                        max-width: 240px;
+                        margin-right: 10px;
+                        background-color: #9eea6a;
+                        display: inline-block;
+                    }
+
+                    &.txtother {
+                        max-width: 240px;
+                        margin-left: 10px;
+                        display: inline-block;
+                    }
+                }
+            }
+
+            .msgtime {
+                text-align: right;
+                color: #aaa;
+                font-size: .7rem;
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/lib/functions.d.ts b/lib/functions.d.ts
new file mode 100644
index 0000000..8b5b3d4
--- /dev/null
+++ b/lib/functions.d.ts
@@ -0,0 +1,2 @@
+export function createElement<K extends keyof HTMLElementTagNameMap>(tagName: K, className?: string, ...children?: (Node | string)[]): HTMLElementTagNameMap[K];
+export function createElementInit<K extends keyof HTMLElementTagNameMap>(tagName: K, init?: (element: HTMLElementTagNameMap[K]) => void, ...children?: (Node | string)[]): HTMLElementTagNameMap[K];
\ No newline at end of file
diff --git a/lib/functions.js b/lib/functions.js
new file mode 100644
index 0000000..717ef7b
--- /dev/null
+++ b/lib/functions.js
@@ -0,0 +1,19 @@
+function createElement(tagName, className, ...children) {
+    return createElementInit(tagName, className && (element => element.className = className), ...children);
+}
+
+function createElementInit(tagName, init, ...children) {
+    const element = document.createElement(tagName);
+    if (typeof init === 'function') {
+        init(element);
+    }
+    if (children.length > 0) {
+        element.append(...children);
+    }
+    return element;
+}
+
+export {
+    createElement,
+    createElementInit
+}
\ No newline at end of file
diff --git a/lib/ui/checkbox.d.ts b/lib/ui/checkbox.d.ts
index da8a0c5..a609838 100644
--- a/lib/ui/checkbox.d.ts
+++ b/lib/ui/checkbox.d.ts
@@ -1,8 +1,9 @@
 interface CheckboxOptions {
+    className?: string;
+    enabled?: boolean;
     type?: string;
     label?: string | HTMLElement;
     checked?: boolean;
-    isImage?: boolean;
     imageHeight?: Number;
     checkedNode?: HTMLElement;
     uncheckedNode?: HTMLElement;
diff --git a/lib/ui/checkbox.html b/lib/ui/checkbox.html
index 377eb89..5f91564 100644
--- a/lib/ui/checkbox.html
+++ b/lib/ui/checkbox.html
@@ -14,7 +14,6 @@
     type?: string;
     label?: string;
     checked?: boolean;
-    isImage?: boolean;
     imageHeight?: Number;
     checkedNode?: HTMLElement;
     uncheckedNode?: HTMLElement;
@@ -22,6 +21,14 @@
     onchange?: (this: HTMLInputElement, ev: Event) => any;
 }</pre>
   </p>
+  <h4>className?: string</h4>
+  <p>
+    复选框的自定义 className
+  </p>
+  <h4>enabled?: boolean</h4>
+  <p>
+    复选框默认是否可用
+  </p>
   <h4>type?: string</h4>
   <p>
     复选框图标的样式，可选值目前有 <code>fa-regular</code>、<code>fa-light</code>、<code>fa-solid</code>
@@ -34,10 +41,6 @@
   <p>
     初始是否选中
   </p>
-  <h4>isImage?: boolean</h4>
-  <p>
-    是否为图片复选框
-  </p>
   <h4>imageHeight?: Number</h4>
   <p>
     为图片复选框时的图片限制高度
diff --git a/lib/ui/checkbox.js b/lib/ui/checkbox.js
index af90e15..8663a95 100644
--- a/lib/ui/checkbox.js
+++ b/lib/ui/checkbox.js
@@ -1,54 +1,51 @@
+import { createElement, createElementInit } from "../functions";
 import { createIcon } from "./icon";
 
 function fillCheckbox(container, type, label) {
-    const layer = document.createElement('layer');
-    layer.className = 'check-box-inner';
-    layer.appendChild(createIcon(type, 'check'));
-    container.appendChild(layer);
+    container.appendChild(
+        createElement('layer', 'check-box-inner', createIcon(type, 'check'))
+    );
     if (label instanceof HTMLElement) {
         container.appendChild(label);
     } else if (label?.length > 0) {
-        const span = document.createElement('span');
-        span.innerText = label;
-        container.appendChild(span);
+        container.appendChild(
+            createElementInit('span', span => span.innerText = label)
+        );
     }
 }
 
 function createCheckbox(opts = {}) {
-    const container = document.createElement('label');
-    container.className = 'checkbox-wrapper';
-    const input = document.createElement('input');
-    input.setAttribute('type', 'checkbox');
-    if (opts.checked === true) {
-        input.checked = true;
+    const container = createElement('label', 'checkbox-wrapper',
+        createElementInit('input', input => {
+            input.setAttribute('type', 'checkbox');
+            if (opts.checked === true) {
+                input.checked = true;
+            }
+            if (opts.enabled === false) {
+                input.disabled = true;
+            }
+            if (opts.customerAttributes != null) {
+                for (let entry of Object.entries(opts.customerAttributes)) {
+                    input.setAttribute(entry[0], entry[1]);
+                }
+            }
+            if (typeof opts.onchange === 'function') {
+                input.addEventListener('change', opts.onchange);
+            }
+        }));
+    if (opts.className) {
+        container.classList.add(opts.className);
     }
-    if (opts.customerAttributes != null) {
-        for (let entry of Object.entries(opts.customerAttributes)) {
-            input.setAttribute(entry[0], entry[1]);
-        }
-    }
-    if (typeof opts.onchange === 'function') {
-        input.addEventListener('change', opts.onchange);
-    }
-    container.appendChild(input);
-    if (opts.isImage) {
+    if (opts.checkedNode != null && opts.uncheckedNode != null) {
         container.classList.add('checkbox-image');
         let height = opts.imageHeight;
         if (isNaN(height) || height <= 0) {
             height = 14;
         }
-        if (opts.checkedNode != null) {
-            if (!opts.checkedNode.classList.contains('checked')) {
-                opts.checkedNode.classList.add('checked');
-            }
-            container.appendChild(opts.checkedNode);
-        }
-        if (opts.uncheckedNode != null) {
-            if (!opts.uncheckedNode.classList.contains('unchecked')) {
-                opts.uncheckedNode.classList.add('unchecked');
-            }
-            container.appendChild(opts.uncheckedNode);
-        }
+        opts.checkedNode.classList.add('checked');
+        container.appendChild(opts.checkedNode);
+        opts.uncheckedNode.classList.add('unchecked');
+        container.appendChild(opts.uncheckedNode);
     } else {
         fillCheckbox(container, opts.type || 'fa-regular', opts.label);
     }
@@ -91,7 +88,7 @@ function resolveCheckbox(container = document.body, legacy) {
                 }
             }
             if (label == null) {
-                label = document.createElement('label');
+                label = createElement('label');
                 chk.parentElement.insertBefore(label, chk);
             } else {
                 text = label.innerText;
@@ -118,7 +115,7 @@ function resolveCheckbox(container = document.body, legacy) {
             box.removeAttribute('data-type');
             box.removeAttribute('data-label');
         }
-        const input = document.createElement('input');
+        const input = createElement('input');
         const id = box.dataset.id;
         if (id?.length > 0) {
             input.id = id;
diff --git a/lib/ui/dropdown.js b/lib/ui/dropdown.js
index ecec701..b436734 100644
--- a/lib/ui/dropdown.js
+++ b/lib/ui/dropdown.js
@@ -2,6 +2,7 @@
 import { r } from "../utility/lgres";
 import { contains, nullOrEmpty } from "../utility/strings";
 import { global, isPositive } from "../utility";
+import { createElement } from "../functions";
 import { createCheckbox } from "./checkbox";
 import { createIcon } from "./icon"
 
@@ -19,7 +20,7 @@ if (dropdownGlobal == null) {
         configurable: false,
         enumerable: false,
         value: function () {
-            const panel = document.querySelector('.dropdown-wrapper .dropdown-panel.active');
+            const panel = document.querySelector('.dropdown-wrapper .dropdown-box.active');
             if (panel == null) {
                 return;
             }
@@ -39,7 +40,7 @@ if (dropdownGlobal == null) {
     document.addEventListener('mousedown', e => {
         let parent = e.target;
         while (parent != null) {
-            if (parent.classList.contains('dropdown-panel')) {
+            if (parent.classList.contains('dropdown-box')) {
                 e.stopPropagation();
                 return;
             }
@@ -110,16 +111,14 @@ class Dropdown {
         const options = this.#options;
 
         // wrapper
-        const wrapper = document.createElement('div');
+        const wrapper = createElement('div', 'dropdown-wrapper');
         const dropId = String(Math.random()).substring(2);
         wrapper.dataset.dropId = dropId;
-        wrapper.className = 'dropdown-wrapper';
         dropdownGlobal[dropId] = this;
         this.#wrapper = wrapper;
 
         // header
-        const header = document.createElement('div');
-        header.className = 'dropdown-header';
+        const header = createElement('div', 'dropdown-header');
         header.addEventListener('click', () => {
             if (this.disabled) {
                 return;
@@ -137,8 +136,7 @@ class Dropdown {
         // label or input
         let label;
         if (options.input) {
-            label = document.createElement('input');
-            label.className = 'dropdown-text';
+            label = createElement('input', 'dropdown-text');
             label.setAttribute('type', 'text');
             options.placeholder && label.setAttribute('placeholder', options.placeholder);
             isPositive(options.maxlength) && label.setAttribute('maxlength', options.maxlength);
@@ -153,8 +151,7 @@ class Dropdown {
             label.addEventListener('mousedown', e => this.#expanded && e.stopPropagation());
         } else {
             isPositive(options.tabindex) && header.setAttribute('tabindex', options.tabindex);
-            label = document.createElement('label');
-            label.className = 'dropdown-text';
+            label = createElement('label', 'dropdown-text');
         }
         this.#label = label;
         if (options.multiselect) {
@@ -167,10 +164,7 @@ class Dropdown {
         } else if (options.selected != null) {
             this.select(options.selected, true);
         }
-        header.appendChild(label);
-        const caret = document.createElement('label');
-        caret.className = 'dropdown-caret';
-        header.appendChild(caret);
+        header.append(label, createElement('label', 'dropdown-caret'));
         wrapper.appendChild(header);
 
         this.disabled = options.disabled || false;
@@ -285,16 +279,13 @@ class Dropdown {
 
     #dropdown(flag = true) {
         const options = this.#options;
-        const textkey = options.textkey;
         let panel = this.#container;
         if (panel == null) {
-            panel = document.createElement('div');
-            panel.className = 'dropdown-panel';
+            panel = createElement('div', 'dropdown-box');
             // search box
             if (!options.input && options.search) {
-                const search = document.createElement('div');
-                search.className = 'dropdown-search';
-                const input = document.createElement('input');
+                const search = createElement('div', 'dropdown-search');
+                const input = createElement('input');
                 input.setAttribute('type', 'text');
                 isPositive(options.tabindex) && input.setAttribute('tabindex', options.tabindex);
                 !nullOrEmpty(options.searchplaceholder) && input.setAttribute('placeholder', options.searchplaceholder);
@@ -303,13 +294,11 @@ class Dropdown {
                     const source = filterSource(options.searchkeys, options.textkey, key, this.source);
                     this.#filllist(source);
                 })
-                search.appendChild(input);
-                search.appendChild(createIcon('fa-light', 'search'));
+                search.append(input, createIcon('fa-light', 'search'));
                 panel.appendChild(search);
             }
             // list
-            const list = document.createElement('ul');
-            list.className = 'dropdown-list';
+            const list = createElement('ul', 'dropdown-list');
             if (!this.multiselect) {
                 list.addEventListener('click', e => {
                     let li = e.target;
@@ -364,15 +353,16 @@ class Dropdown {
         const multiselect = this.multiselect;
         const allchecked = this.#allChecked;
         if (multiselect) {
-            const liall = document.createElement('li');
-            const boxall = createCheckbox({
-                label: r('allItem', '( All )'),
-                checked: allchecked,
-                customerAttributes: { 'isall': '1' },
-                onchange: e => this.#triggerselect(e.target)
-            });
-            liall.appendChild(boxall);
-            list.appendChild(liall);
+            list.appendChild(
+                createElement('li', null,
+                    createCheckbox({
+                        label: r('allItem', '( All )'),
+                        checked: allchecked,
+                        customerAttributes: { 'isall': '1' },
+                        onchange: e => this.#triggerselect(e.target)
+                    })
+                )
+            );
         }
         // TODO: virtual mode
         const valuekey = this.#options.valuekey;
@@ -383,7 +373,7 @@ class Dropdown {
         let scrolled;
         source.slice(0, 200).forEach((item, i) => {
             const val = item[valuekey];
-            const li = document.createElement('li');
+            const li = createElement('li');
             li.dataset.value = val;
             li.setAttribute('title', item[textkey]);
             let label;
@@ -394,7 +384,7 @@ class Dropdown {
             if (multiselect) {
                 const selected = selectedlist.some(s => s[valuekey] === val);
                 if (label == null) {
-                    label = document.createElement('span');
+                    label = createElement('span');
                     label.innerText = item[textkey];
                 }
                 const box = createCheckbox({
diff --git a/lib/ui/grid.html b/lib/ui/grid.html
index ff2d59b..949e160 100644
--- a/lib/ui/grid.html
+++ b/lib/ui/grid.html
@@ -170,8 +170,6 @@
       };
 
       const iconCol = {
-        ...Grid.GridColumn,
-
         create() {
           const a = document.createElement('a');
           a.target = '_blank';
@@ -186,7 +184,8 @@
         },
         setEnabled(element, enabled) {
           element.style.display = enabled === false ? 'none' : '';
-        }
+        },
+        setStyle: Grid.GridColumn.setStyle
       };
 
       // grid.readonly = true;
@@ -205,7 +204,8 @@
             { value: 'broken', text: 'Broken' },
             { value: 'running', text: 'Running' }
           ],
-          enabled: 'enabled'
+          enabled: 'enabled',
+          onchanged: (item, value) => console.log('dropdown changed', item, value)
         },
         {
           key: 'c2b',
diff --git a/lib/ui/grid.js b/lib/ui/grid.js
index 97a0e6b..df8609c 100644
--- a/lib/ui/grid.js
+++ b/lib/ui/grid.js
@@ -1,6 +1,7 @@
 import { global, isPositive, isMobile, throttle, truncate } from "../utility";
 import { nullOrEmpty } from "../utility/strings";
 import { r } from "../utility/lgres";
+import { createElement, createElementInit } from "../functions";
 import { createIcon } from "./icon";
 import { createCheckbox } from "./checkbox";
 import { setTooltip } from "./tooltip";
@@ -41,7 +42,7 @@ function indexOfParent(target) {
 }
 
 class GridColumn {
-    static create() { return document.createElement('span') }
+    static create() { return createElement('span') }
 
     static setValue(element, val) { element.innerText = val }
 
@@ -54,7 +55,7 @@ class GridColumn {
 
 class GridInputColumn extends GridColumn {
     static createEdit(trigger) {
-        const input = document.createElement('input');
+        const input = createElement('input');
         input.setAttribute('type', 'text');
         if (typeof trigger === 'function') {
             input.addEventListener('change', trigger);
@@ -157,12 +158,7 @@ class GridCheckboxColumn extends GridColumn {
 }
 
 class GridIconColumn extends GridColumn {
-    static create() {
-        const element = document.createElement('span');
-        element.className = 'icon';
-        // element.appendChild(document.createElement('layer'));
-        return element;
-    }
+    static create() { return createElement('span', 'icon') }
 
     static setValue(element, val, item, col) {
         let type = col.iconType;
@@ -351,8 +347,7 @@ class Grid {
             throw new Error('no specified parent.');
         }
         this.#parent = container;
-        const grid = document.createElement('div');
-        grid.className = 'grid';
+        const grid = createElement('div', 'grid');
         grid.setAttribute('tabindex', 0);
         grid.addEventListener('keydown', e => {
             let index = this.selectedIndex;
@@ -382,8 +377,7 @@ class Grid {
             }
         });
         container.replaceChildren(grid);
-        const sizer = document.createElement('span');
-        sizer.className = 'grid-sizer';
+        const sizer = createElement('span', 'grid-sizer');
         grid.appendChild(sizer);
         this.#refs.sizer = sizer;
 
@@ -394,11 +388,9 @@ class Grid {
         grid.appendChild(body);
 
         // loading
-        const loading = document.createElement('div');
-        loading.className = 'grid-loading';
-        const loadingHolder = document.createElement('div');
-        loadingHolder.appendChild(createIcon('fa-regular', 'spinner-third'));
-        loading.appendChild(loadingHolder);
+        const loading = createElement('div', 'grid-loading',
+            createElement('div', null, createIcon('fa-regular', 'spinner-third'))
+        );
         this.#refs.loading = loading;
         grid.appendChild(loading);
         this.#el = grid;
@@ -548,14 +540,13 @@ class Grid {
     }
 
     #createHeader() {
-        const thead = document.createElement('table');
-        thead.className = 'grid-header';
-        const header = document.createElement('tr');
+        const thead = createElement('table', 'grid-header');
+        const header = createElement('tr');
         thead.appendChild(header);
         const sizer = this.#refs.sizer;
         for (let col of this.columns) {
             if (col.visible === false) {
-                const hidden = document.createElement('th');
+                const hidden = createElement('th');
                 hidden.style.display = 'none';
                 if (col.sortable !== false) {
                     hidden.dataset.key = col.key;
@@ -594,8 +585,7 @@ class Grid {
             };
             this.#set(col.key, 'style', style);
             // element
-            const th = document.createElement('th');
-            th.className = 'column';
+            const th = createElement('th', 'column');
             th.dataset.key = col.key;
             for (let css of Object.entries(style)) {
                 th.style.setProperty(css[0], css[1]);
@@ -608,7 +598,7 @@ class Grid {
                 col.orderable = true;
                 th.addEventListener('mousedown', e => this.#onDragStart(e, col));
             }
-            const wrapper = document.createElement('div');
+            const wrapper = createElement('div');
             th.appendChild(wrapper);
             if (!this.readonly && col.enabled !== false && col.allcheck && isCheckbox) {
                 const check = createCheckbox({
@@ -616,7 +606,7 @@ class Grid {
                 });
                 wrapper.appendChild(check);
             }
-            const caption = document.createElement('span');
+            const caption = createElement('span');
             if (col.textStyle != null) {
                 for (let css of Object.entries(col.textStyle)) {
                     caption.style.setProperty(css[0], css[1]);
@@ -626,9 +616,7 @@ class Grid {
             wrapper.appendChild(caption);
             // order arrow
             if (col.sortable) {
-                const arrow = document.createElement('layer');
-                arrow.className = 'arrow';
-                th.appendChild(arrow);
+                th.appendChild(createElement('layer', 'arrow'));
             }
             // filter
             if (col.allowFilter) {
@@ -636,8 +624,7 @@ class Grid {
             }
             // resize spliter
             if (col.resizable !== false) {
-                const spliter = document.createElement('layer');
-                spliter.className = 'spliter';
+                const spliter = createElement('layer', 'spliter');
                 spliter.addEventListener('mousedown', e => this.#onResizeStart(e, col));
                 spliter.addEventListener('dblclick', e => this.#onAutoResize(e, col));
                 th.appendChild(spliter);
@@ -646,13 +633,9 @@ class Grid {
             // !nullOrEmpty(col.tooltip) && setTooltip(th, col.tooltip);
             header.appendChild(th);
         }
-        const placeholder = document.createElement('th');
-        const dragger = document.createElement('div');
-        dragger.className = 'dragger';
-        const draggerCursor = document.createElement('layer');
-        draggerCursor.className = 'dragger-cursor';
-        placeholder.append(dragger, draggerCursor);
-        header.appendChild(placeholder);
+        const dragger = createElement('div', 'dragger');
+        const draggerCursor = createElement('layer', 'dragger-cursor');
+        header.appendChild(createElement('th', null, dragger, draggerCursor));
 
         sizer.replaceChildren();
         this.#refs.header = header;
@@ -662,8 +645,7 @@ class Grid {
     }
 
     #createBody() {
-        const body = document.createElement('div');
-        body.className = 'grid-body';
+        const body = createElement('div', 'grid-body');
         body.addEventListener('scroll', e => throttle(this.#onScroll, RefreshInterval, this, e), { passive: true });
         const cols = this.columns;
         let width = 1;
@@ -673,7 +655,7 @@ class Grid {
             }
         }
         // body container
-        const bodyContainer = document.createElement('div');
+        const bodyContainer = createElement('div');
         bodyContainer.style.position = 'relative';
         bodyContainer.style.minWidth = '100%';
         bodyContainer.style.minHeight = '1px';
@@ -682,8 +664,7 @@ class Grid {
         }
         body.appendChild(bodyContainer);
         // body content
-        const bodyContent = document.createElement('table');
-        bodyContent.className = 'grid-body-content';
+        const bodyContent = createElement('table', 'grid-body-content');
         bodyContent.addEventListener('mousedown', e => {
             let [parent, target] = this.#getRowTarget(e.target);
             const rowIndex = indexOfParent(parent);
@@ -698,8 +679,7 @@ class Grid {
         // this.#adjustRows();
         // events
         if (!this.holderDisabled) {
-            const holder = document.createElement('div');
-            holder.className = 'grid-hover-holder';
+            const holder = createElement('div', 'grid-hover-holder');
             holder.addEventListener('mousedown', e => {
                 const keyid = e.currentTarget.keyid;
                 if (keyid == null) {
@@ -730,12 +710,11 @@ class Grid {
         count -= exists;
         if (count > 0) {
             for (let i = 0; i < count; i += 1) {
-                const row = document.createElement('tr');
-                row.className = 'grid-row';
+                const row = createElement('tr', 'grid-row');
                 // row.addEventListener('mousedown', e => this.#onRowClicked(e, exists + i));
                 // row.addEventListener('dblclick', e => this.#onRowDblClicked(e));
                 cols.forEach((col, j) => {
-                    const cell = document.createElement('td');
+                    const cell = createElement('td');
                     if (col.visible !== false) {
                         cell.keyid = ((exists + i) << MaxColumnBit) | j;
                         const style = this.#get(col.key, 'style');
@@ -771,7 +750,7 @@ class Grid {
                     }
                     row.appendChild(cell);
                 });
-                row.appendChild(document.createElement('td'));
+                row.appendChild(createElement('td'));
                 content.appendChild(row);
             }
         } else if (count < 0) {
diff --git a/lib/ui/icon.d.ts b/lib/ui/icon.d.ts
index a812033..b7cee19 100644
--- a/lib/ui/icon.d.ts
+++ b/lib/ui/icon.d.ts
@@ -1,2 +1,2 @@
-export function createIcon(type: string, id: string): SVGSVGElement
+export function createIcon(type: string, id: string, style?: { [key: string]: string }): SVGSVGElement
 export function resolveIcon(container: HTMLElement): HTMLElement
\ No newline at end of file
diff --git a/lib/ui/icon.html b/lib/ui/icon.html
index 8b15233..3d2aadd 100644
--- a/lib/ui/icon.html
+++ b/lib/ui/icon.html
@@ -6,7 +6,7 @@
     标签到指定的图标元素。
   </p>
   <h2>createIcon</h2>
-  <code>function createIcon(type: string, id: string): SVGElement</code>
+  <code>function createIcon(type: string, id: string, style?: { [key: string]: string }): SVGElement</code>
   <h3>type: string</h3>
   <p>
     图标类型，可选值目前有 <code>fa-regular</code>、<code>fa-light</code>、<code>fa-solid</code>
@@ -16,6 +16,10 @@
     图形 id，例如
     <code>user-edit</code>、<code>address-card</code>、<code>frog</code>……
   </p>
+  <h3>style?: { [key: string]: string }</h3>
+  <p>
+    自定义样式的对象
+  </p>
   <h2>resolveIcon</h2>
   <code>function resolveIcon(container: HTMLElement): HTMLElement</code>
   <h3>container: HTMLElement</h3>
diff --git a/lib/ui/icon.js b/lib/ui/icon.js
index 63410a5..21831b2 100644
--- a/lib/ui/icon.js
+++ b/lib/ui/icon.js
@@ -9,9 +9,14 @@ function createUse(type, id) {
     return use;
 }
 
-function createIcon(type, id) {
+function createIcon(type, id, style) {
     const svg = document.createElementNS(svgns, 'svg');
     svg.appendChild(createUse(type, id));
+    if (style != null) {
+        for (let css of Object.entries(style)) {
+            svg.style.setProperty(css[0], css[1]);
+        }
+    }
     return svg;
 }
 
diff --git a/lib/ui/tooltip.d.ts b/lib/ui/tooltip.d.ts
index aa43040..de17fd8 100644
--- a/lib/ui/tooltip.d.ts
+++ b/lib/ui/tooltip.d.ts
@@ -1,2 +1,2 @@
-export function setTooltip(container: HTMLElement, content: string | HTMLElement): void
+export function setTooltip(container: HTMLElement, content: string | HTMLElement): HTMLElement
 export function resolveTooltip(container?: HTMLElement): HTMLElement
\ No newline at end of file
diff --git a/lib/ui/tooltip.js b/lib/ui/tooltip.js
index bc6dc64..312bf46 100644
--- a/lib/ui/tooltip.js
+++ b/lib/ui/tooltip.js
@@ -1,23 +1,28 @@
-function setTooltip(container, content) {
-    const wrapper = document.createElement('div');
-    wrapper.className = 'tooltip-wrapper tooltip-color';
-    wrapper.style.visibility = 'hidden';
-    wrapper.style.opacity = 0;
-    const pointer = document.createElement('div');
-    pointer.className = 'tooltip-pointer tooltip-color';
-    const curtain = document.createElement('div');
-    curtain.className = 'tooltip-curtain tooltip-color';
-    wrapper.append(pointer, curtain);
+import { createElement, createElementInit } from "../functions";
 
-    const cnt = document.createElement('div');
-    cnt.className = 'tooltip-content';
-    if (content instanceof HTMLElement) {
-        cnt.appendChild(content);
-    } else {
-        cnt.innerText = content;
+function setTooltip(container, content) {
+    const tip = container.querySelector('.tooltip-wrapper');
+    if (tip != null) {
+        tip.remove();
     }
-    wrapper.appendChild(cnt);
-    container.insertAdjacentElement('afterend', wrapper);
+    const wrapper = createElementInit('div', wrapper => {
+        wrapper.className = 'tooltip-wrapper tooltip-color';
+        wrapper.style.visibility = 'hidden';
+        wrapper.style.opacity = 0;
+    },
+        createElement('div', 'tooltip-pointer tooltip-color'),
+        createElement('div', 'tooltip-curtain tooltip-color'),
+        createElementInit('div', cnt => {
+            cnt.className = 'tooltip-content';
+            if (content instanceof HTMLElement) {
+                cnt.appendChild(content);
+            } else {
+                cnt.innerText = content;
+            }
+        })
+    );
+    // container.insertAdjacentElement('afterend', wrapper);
+    container.appendChild(wrapper);
 
     let tid;
     container.addEventListener('mouseenter', () => {
@@ -56,6 +61,7 @@ function setTooltip(container, content) {
             wrapper.style.opacity = 0;
         }, 300);
     });
+    return container;
 }
 
 function resolveTooltip(container = document.body) {
diff --git a/lib/utility.js b/lib/utility.js
index 24de190..65fd0e1 100644
--- a/lib/utility.js
+++ b/lib/utility.js
@@ -31,6 +31,14 @@ function truncate(v) {
     return (v > 0 ? Math.floor : Math.ceil)(v);
 }
 
+function isEmail(text) {
+    return /^\w[-\w.+]*@\w+([-.]\w+)*\.\w+([-.]\w+)*$/.test(text);
+}
+
+function isPhone(text) {
+    return /^[1-9]\d{9,}$/.test(text);
+}
+
 export {
     // cookie
     getCookie,
@@ -55,5 +63,7 @@ export {
     isMobile,
     // functions
     throttle,
-    truncate
+    truncate,
+    isEmail,
+    isPhone
 }
\ No newline at end of file
diff --git a/vite.build.js b/vite.build.js
index 52bafd9..bd5952e 100644
--- a/vite.build.js
+++ b/vite.build.js
@@ -16,6 +16,34 @@ const libraries = [
         formats: ['umd'],
         fileName: (_format, name) => `${name}.min.js`
       },
+      rollupOptions: {
+        output: {
+          assetFileNames: info => info.name === 'style.css' ? 'ui.min.css' : info.name
+        }
+      },
+      sourcemap: true,
+      emptyOutDir: false
+    }
+  },
+  {
+    clearScreen: false,
+    css: {
+      postcss: {
+        plugins: [postcssPresetEnv()]
+      }
+    },
+    build: {
+      lib: {
+        entry: './lib/app.js',
+        name: 'lib-app',
+        formats: ['umd'],
+        fileName: (_format, name) => `${name}.min.js`
+      },
+      rollupOptions: {
+        output: {
+          assetFileNames: info => info.name === 'style.css' ? 'app.min.css' : info.name
+        }
+      },
       sourcemap: true,
       emptyOutDir: false
     }