*/ /* obtain elements : there are three functions can obtain element nodes => via id, tag name, class name;*/ console.log(typeof document.getElementById("purchases")); /* It will show "object" in browser */ console.log(document.getElementsByTagName("li").length); /* this function...
该方法是通过NAME属性来获得元素,但注意区别:getElementById()中是element,而getElementsByName()是elements。显而易见,getElementsByName()返回值有很多,这是因为DOCUMENT中每一个元素的ID是唯一的,但NAME却可以重复。如果一个文档中有两个以上的标签NAME相同,那么getElementsByName()就可以取得这些元素组成一个数组。
但注意区别:getElementById()中是element,而getElementsByName是elements。显而易见,geteElementsByName()返回值有很多,这是因为Document中每一个元素的唯一的,但Name却可以重复。如果一个文档中有两个以上的标签Name相同,那么getElementsByName()就可以取得这些元素组成一个数组。 例如: 1. 2. 那么可以用getElemen...
*/functiongetElementsByClassName_zdy(node,classname){if(node.getElementsByClassName){returnnode.getElementsByClassName(classname);}else{varresults=Array();varelements=node.getElementsByTagName('*');for(vari=0;i<elements.length;i++){if(elements[i].className.indexOf(classname)!=-1){results[results.le...
// 使用getElementsByName()方法获取所有名称为"username"的元素varelements=document.getElementsByName("username"); 1. 2. 步骤4:处理获取到的元素集合 最后,我们可以对获取到的元素集合进行操作,比如修改它们的样式或属性。例如,将获取到的所有元素的背景颜色设置为红色,代码如下: ...
("string"==typeof t)i[X(t)]=n;else for(r in t)i[X(r)]=t[r];return i},get:function(e,t){return void 0===t?this.cache(e):e[this.expando]&&e[this.expando][X(t)]},access:function(e,t,n){return void 0===t||t&&"string"==typeof t&&void 0===n?this.get(e,t)...
5. 循环中的闭包 Closures in loops举例: var elements = document.getElementByTagName(‘div’); for (var i = 0; ielements.length; i++) { elements[i].onclick = function() { alert(Div number + i); } } 在这里例子里面,当用户点击不同的divs时,我们想触发一个动作(显示Div number 1, Div...
In the above example, I have four different elements. Out of which only 3 haveidsand all areunique. In the section, I have used thegetElementById()method twice: Thefirstmethod has the id (your_name) of aninput boxof type text. The method has some propeties. I am using thevalueprop...
One effective alternative when multiple DOM elements need to be added is to usedocument fragmentsinstead, which willimprove efficiency and performance. For example: constdiv =document.getElementById("my_div");constfragment =document.createDocumentFragment();constelems =document.querySelectorAll('a')...
{ name: "Tom", age: 16, favoriteColor: "green" }, { name: "Chris", age: 42, favoriteColor: "blue" }, ]; // Bind the current person to the HTML elements in the section var section = element.querySelector("section[role=main]"); var current = 0; WinJS.Binding.processAll(...