JavaScript fundamental (ES6 Syntax): Exercise-174 with SolutionConvert NodeList to ArrayWrite a JavaScript program to convert a NodeList into an array.Use spread operator (...) inside new array to convert a NodeList to an array.Sample Solution:JavaScript Code:// Define a function 'nodeListToA...
比如使用map()方法来处理NodeList。 使用forEach 虽然不是直接转换为数组,但您可以使用forEach遍历NodeList并手动将其存储在一个数组中。 constnodeList=document.querySelectorAll('div');// 获取所有的 div 元素constarrayFromForEach=[];nodeList.forEach(node=>arrayFromForEach.push(node));// 手动添加到数组...
2. Converting function argument into an array use Array.prototype.slice() and then the function call() method to convert arguments collection into an array. an array-like object consisting of all arguments passed to the function convert a NodeList into an array function sumRounds() { var args...
the NodeList object. But this object doesn’t have all array’s functions, like:sort(),reduce(),map(),filter(). In order to enable these and many other native array’s functions you need to convert NodeList into Arrays. To run this technique just use this function:...
4 ways to convert an array-like object, such as HTMLCollection and NodeList, to JavaScript arrays for access to array methods like the forEach loop.
想想还有什么同时能满足以上条件的?NodeList,HTML Collections,仔细想想,甚至还有字符串,或者拥有 length 属性的对象,函数(length 属性值为形参数量),等等。 Array-Like to Array 有的时候,需要将 Array-Like Objects 转为 Array 类型,使之能用数组的一些方法,一个非常简单粗暴并且兼容性良好的方法是新建个数组,然后...
NodeList 是有生命、有呼吸的对象,而不是在我们第一次访问它们的某个瞬间拍摄下来的一张快照。 NodeList 转换为数组: function convertToArray(nodes) { var array = null; try { array = Array.prototype.slice.call(nodes, 0); // 针对非 IE 浏览器 } catch (e) { array = new Array(); for (var...
(但还有一点要注意的是,如果是 arguments 转为 Array,最好别用 Array.prototype.slice,V8 下会很慢,具体可以看下避免修改和传递 arguments 给其他方法 — 影响优化) function nodeListToArray(nodes){ var arr, length; try { // works in every browser except IE...
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var checkboxes = document.querySelectorAll('input[type="checkbox"]'); var checkedOne = Array.prototype.slice.call(checkboxes).some(x => x.checked); You need theArray.prototype.slice.callpart to convert theNodeListreturned bydocument.querySelectorAllinto an array that you can callsomeon....