function getLastElementChild(obj){ if(obj.lastElementChild != undefined){ return obj.lastElementChild; }else{ var nodeLast = obj.lastChild; while(nodeLast && nodeLast.nodeType != 1){ nodeLast = nodeLast.previousSibling; } return nodeLast; } } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10...
element.firstElementChild,element.lastElementChild分别返回第一个和最后一个子元素节点,IE9+ 代码: 我第一 我最后 var ul=document.querySelector("ul") console.log(ul.firstElementChild); console.log(ul.lastElementChild); 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. ...
AI代码解释 letcloneEl=nullletoriginalEl=nulldocument.getElementById('list').addEventListener('click',function(e){e.preventDefault()if(e.target.classList.contains('item')){originalEl=e.target// 缓存原始图DOM节点cloneEl=originalEl.cloneNode(true)// 克隆图片originalEl.style.opacity=0openPreview()/...
myReady(function(){varmyDiv = document.getElementById('myDiv');//querySelector(id)varul = myDiv.querySelector('#myUl');varul = document.querySelector('#myUl');//querySelector(css选择器)varli = myDiv.querySelector('li:last-child');//querySelector(tag)varels = document.querySelect...
alert(floats.length);//3alert(floats.buffer.byteLength);//12alert(floats[2]);//1.6180000305175781定型数组的构造函数和实例都有一个BYTES_PER_ELEMENT属性,返回该类型数组中每个元素的大小。 alert(Int16Array.BYTES_PER_ELEMENT);//2alert(Int32Array.BYTES_PER_ELEMENT);//4const ints=newInt32Array(1)...
lastChile; // 最后一个子节点 var previous = test.previousSibling; // 上一个兄弟节点 var next = test.nextSibling; // 下一个兄弟节点 var parent = test.parentElement; // 父节点元素 var first = test.firstElementChild; // 第一个子节点元素 var last = test.lastElementChile; // 最后一个子...
getElementById("jspaint-iframe"); var jspaint = iframe.contentWindow; var icon = new Image(); icon.src = "some-folder/some-image-15x11-pixels.png"; jspaint.undoable({ name: "Seam Carve", icon: icon, // optional }, function() { // do something to the canvas });...
allowAbsoluteUrls: true, // `transformRequest` allows changes to the request data before it is sent to the server // This is only applicable for request methods 'PUT', 'POST', 'PATCH' and 'DELETE' // The last function in the array must return a string or an instance of Buffer, Array...
}// hls.js is not supported on platforms that do not have Media Source Extensions (MSE) enabled.// When the browser has built-in HLS support (check using `canPlayType`), we can provide an HLS manifest (i.e. .m3u8 URL) directly to the video element throught the `src` property.// ...
通过class名寻找:var 标签名 = document.getElementByClassName(class值) 修改标签属性: 标签名.id=id属性值 标签名.className = class属性值 ... 标签名.属性名 = 属性值 修改标签样式: 标签名.style.css属性 = 属性值 注意:只能修改内联样式 查询...