option><option value="zh" selected>中国的</option></select><script> var lang = document.querySelector("#language-picker"); lang.addEventListener("change", function(e) { if (e.target.value === "en") {window.location = "/"; } else {window.location = "/" + e.target.value; } }...
(function () { // 获取元素 function getElem (el) { return document.querySelector(el); } function getElems (el) { return document.querySelectorAll(el); } let btn = getElem('#btn'), selectBox = getElem('.select'), searchBox = getElem('search'); let ss = document.getElementById...
value; var price = document.querySelector("input[name=price]").value; fetch("/get?name="+name+"&price="+price, { method: 'GET', headers: { 'Content-Type': 'application/json' }, // body: JSON.stringify({"name":name,"price":price}) }) .then(response => response.json()) ....
var myNodeList = document.querySelectorAll('li'); forEach(myNodeList, function (index, value) { console.log(index, value); // passes index + value back! }); 还有一种语法:for..of 循环,但似乎只有Firefox支持: /* Be warned, this only works in Firefox */ var divs = document.querySele...
// 给DOM添加属性(添加一个可以为name,value为hello的属性) document.querySelector("#title").setAttribute("name","hello"); class选择 // 获取DOM中的内容 document.querySelector(".title").innerText; // 将DOM设置为粉红色背景 document.querySelector(".title").style.backgroundColor="pink"; ...
value="cake" >蛋糕</option> <option value="nuts" >坚果</option> </select> </p> <p>该系列有:<span></span></p> <script> var menu=document.querySelector('#menu'), opt=menu.querySlectorAll('option'); function show(){ switch(this.value){ case } } } </script> </body> </...
<option value="id6">选项6</option> </select> JavaScript代码: 代码语言:txt 复制 // 获取两个下拉菜单的DOM元素 var menu1 = document.getElementById("menu1"); var menu2 = document.getElementById("menu2"); // 使用querySelectorAll选择器来选择需要隐藏的ID选项 ...
语法 document.querySelector(CSS selectors)参数值 参数类型描述 CSS 选择器String 必须。指定⼀个或多个匹配元素的 CSS 选择器。可以使⽤它们的 id, 类, 类型, 属性, 属性值等来选取元素。对于多个选择器，使⽤逗号隔开，返回⼀个匹配的元素。技术细节 DOM 版 本:Selectors Level 1 Document Object 返回...
[data-value="'+this.value+'"]').click() }); } // (function() {// jQuery('.swatch :radio').change(function() {// var optionIndex = jQuery(this).closest('.swatch').attr('data-index');// var optionValue = jQuery(this).val();// });// }); })</script>我正在尝试让脚本...
Return Value:A NodeList object, representing all elements in the document that matches the specified CSS selector(s). The NodeList is a static collection, meaning that changes in the DOM has NO effect in the collection. Throws a SYNTAX_ERR exception if the selector(s) is invalid ...