fix some issues

lib/ui/grid/column.js

@@ -312,7 +312,9 @@ export class GridDateColumn extends GridColumn {
 
     static setValue(element, val) {
         if (element.tagName === 'INPUT') {
-            if (isNaN(val)) {
+            if (val === '') {
+                element.value = '';
+            } else if (isNaN(val)) {
                 if (/^\d{4}-\d{2}-\d{2}$/.test(val)) {
                     element.value = val;
                 } else if (/^\d{1,2}\/\d{1,2}\/\d{4}$/.test(val)) {

lib/ui/grid/grid.d.ts

@@ -275,10 +275,10 @@ export class Grid {
     removeItem(index: number): GridItem;
     /**
      * 批量删除行数据
-     * @param indexes 待删除的行索引数组
+     * @param indexes 待删除的行索引数组，未传值时删除所有行
      * @returns 返回已删除的行数据数组
      */
-    removeItems(indexes: Array<number>): Array<GridItem>;
+    removeItems(indexes?: Array<number>): Array<GridItem>;
     /**
      * 滚动到指定行的位置
      * @param index 待滚动至的行索引

lib/ui/grid/grid.js

@@ -208,7 +208,8 @@ export class Grid {
             throw new Error('no source');
         }
         if (!Array.isArray(array) || array.length <= 0) {
-            throw new Error(`invalid items array: ${array}`);
+            // throw new Error(`invalid items array: ${array}`);
+            return;
         }
         const it = index >= 0 ? this._var.currentSource[index] : null;
         if (it != null) {
@@ -260,10 +261,11 @@ export class Grid {
         if (this._var.currentSource == null) {
             throw new Error('no source');
         }
-        if (!Array.isArray(indexes) || indexes.length <= 0) {
-            throw new Error(`invalid selected indexes: ${indexes}`);
+        if (Array.isArray(indexes) && indexes.length > 0) {
+            indexes = indexes.slice().sort();
+        } else {
+            indexes = this._var.currentSource.map(a => a.__index);
         }
-        indexes = indexes.slice().sort();
         const array = [];
         let first = 0;
         for (let i = indexes.length - 1; i >= 0; --i) {