itemEl.classList.remove('open'); itemEl.removeChild(itemEl.lastChild); } else { itemEl.classList.add('open'); const submenuEl = createMenu(item.children); itemEl.appendChild(submenuEl); } }); } menuEl.appendChild(itemEl); }); return menuEl; } const menuEl = createMenu(menu); docu...
lastChildInstead of removing firstChild, use lastChild which is faster for removing the last element. The loop will check for firstChild just in case it's faster to check for firstChild than lastChild:<!DOCTYPE html> Title of the Document...
btn.onclick=()=>{constelement=document.getElementById('parentDiv');while(element.firstChild){element.removeChild(element.lastChild);}} Use theremove()Function to Remove All Child Elements in JavaScript Now, practice theremove()function in the following code. ...
层次选择器:$("ancestor descendant")、$("parent>child")、$("prev+next")、$("prev~siblings"):prev之后的所有siblings元素 过滤选择器: (1) 基本过滤选择器::first 、:last、:not(selector)、:even、 :odd、 :eq(index)、 :gt(index)、 :lt(index)、 :header、 :animated、 :focus (2) 内容过...
node.lastChild.remove(); } } 2 changes: 1 addition & 1 deletion 2 src/ol/renderer/Composite.js Original file line numberDiff line numberDiff line change @@ -77,7 +77,7 @@ class CompositeMapRenderer extends MapRenderer { disposeInternal() { unlistenByKey(this.fontChangeListenerKey_); ...
$(function(){ // $("ul li").remove("li[title='苹果']"); //$("ul li:last-child").remove(); // $("ul li:first-child").remove(); //$("ul li:eq(0)").remove(); //$("ul li:even").remove(); //$("ul li:odd")....
在为空的对象上不能读取removeChild属性。要么你就是在HTML元素加载之前调用了该JS导致这样的错误，要么包含的关系不对。
root.addChild(mc); var miTicker = createjs.Ticker.on("tick", rotateDraw); var color = "# 0fe"; var increment = 0; function rotateDraw() { //Process to draw line: Create, origin, properties, increase to paint in another position, turn, paint in stage, define index line = new cr...
Convert an HTML table to JSON and export it to a file in JS I wrotea bookin which I share everything I know about how to become a better, more efficient programmer. You can use the search field on myHome Pageto filter through all of my articles. ...
As soon as process.stdin is evaluated, it sets the file descriptor to non-blocking IO (O_NONBLOCK). This makes it hard to share stdin with child processes, since many third-party utilities do not expect O_NONBLOCK to be set. For example,...