structure adjustment

lib/ui/icon.js

@@ -9,6 +9,13 @@ function createUse(type, id) {
     return use;
 }
 
+function changeIcon(svg, type, id) {
+    if (svg instanceof HTMLElement) {
+        svg.replaceChildren(createUse(type, id));
+    }
+    return svg;
+}
+
 function createIcon(type, id, style) {
     const svg = document.createElementNS(svgns, 'svg');
     svg.appendChild(createUse(type, id));
@@ -34,5 +41,6 @@ function resolveIcon(container) {
 
 export {
     createIcon,
+    changeIcon,
     resolveIcon
 }