// elemAttrAlign.value=('center'); //向“align”属性赋值 newElem.setAttributeNode(elemAttrStyle);//将“style”属性添加给<p>标签 // newElem.setAttributeNode(elemAttrAlign); //将“align”属性添加给<p>标签 varbody=document.querySelector('body');//选择页面<body>标签 body.appendChild(newElem...
<input type="number" max="100" min="10" value=""> 方式二：oninput // 只限制长度：输入...
var element =document.querySelector(selectors);element 是返回的一个元素对象selectors 是一组匹配的选择器<ul> <liclass="test"id="l1"></li> <liclass="test"id="l2"></li> <liclass="test"id="l3"></li> <liclass="test"id="l4"></li> <liclass="test"id="l5"></li...
Inserts a set of Node objects or strings before the first child of the document. Document.querySelector() Returns the first Element node within the document, in document order, that matches the specified selectors. Document.querySelectorAll() Returns a list of all the Element nodes within the...
6.document.querySelector() //通过选择器获取第一个 7.document.getRootNode() //获取根节点 相当于整个页面 二、创建节点的方法 1.document.createElement('p') //创建元素 传入对应的标签名 2.document.createAttribute('') //创建属性节点(是一个对象) 默认是一个空值 ...
Return value AnHTMLElementobject representing the first element in the document that matches the specified set ofCSS selectors, ornullis returned if there are no matches. If you need a list of all elements matching the specified selectors, you should usequerySelectorAll()instead. ...
elementList =document.querySelectorAll('.myclass'); 这两个方法的参数,可以是逗号分隔的多个 CSS 选择器,返回匹配其中一个选择器的元素节点,这与 CSS 选择器的规则是一致的。 varmatches =document.querySelectorAll('div.note, div.alert'); 上面代码返...
querySelectorAll<K>(K) 傳回符合選取器之節點的所有元素子代。 TypeScript 複製 function querySelectorAll<K>(selectors: K): NodeListOf<HTMLElementTagNameMap[K]> 參數 selectors K 傳回 NodeListOf<HTMLElementTagNameMap[K]> 繼承自 ParentNode.querySelectorAll...
querySelector() Returns the first element that matches a specified CSS selector(s) in the document querySelectorAll() Returns a static NodeList containing all elements that matches a specified CSS selector(s) in the document readyState Returns the (loading) status of the document referrer Retur...
querySelector()Returns the first element that matches a specified CSS selector(s) in the document querySelectorAll()Returns a staticNodeListcontaining all elements that matches a specified CSS selector(s) in the document readyStateReturns the (loading) status of the document ...