such asHTMLCollection,NodeList, argument list and even strings. Today I’m going to show you how to make these objects a little bit more useful, by converting them into JavaScript arrays.
使用Array.from() 方法: Array.from() 方法可以将类似数组的对象(包括 HTMLCollection)转换为一个真正的数组。javascript let htmlCollection = document.getElementsByTagName('div'); let array = Array.from(htmlCollection); 使用扩展运算符 (...): 扩展运算符可以将可迭代对象(如 HTMLCollection)的元素展开为...
获取父节点idownercn后，使用map[ownercn] 获取父节点。将当前节点push到父节点中。完美。
问将HTMLCollection转换为数组的最有效方法EN由于这获得了很多视图，请注意(per @oriol's comment)，以下...
添加到 ES6 的是Array.from()会将类似数组的结构转换为实际数组。这允许人们像这样直接枚举一个列表: "use strict"; Array.from(document.getElementsByClassName("events")).forEach(function(item) { console.log(item.id); }); 工作演示(截至 2016 年 4 月在 Firefox、Chrome 和 Edge 中):https://jsfid...
This interface was anattempt to create an unmodifiable listand only continues to be supported to not break code that's already using it. Modern APIs represent list structures using types based on JavaScriptarrays, thus making many array methods available, and at the same time imposing additional ...
array.push(nodes[i]); } }returnarray; }varchildNew=convertToArray(childN); console.log(childNewinstanceofArray);//true HTMLCollection HTMLCollection对象与NodeList对象类似,也是节点的集合,返回一个类数组对象。但二者有不同之处 NodeList集合主要是Node节点的集合,而HTMLCollection集合主要是Element元素节点的集...
Theat the specified index, orifis less than zero or greater than or equal to the length property. Usage notes Theitem()method returns a numbered element from anHTMLCollection. In JavaScript, it is easier to treat theHTMLCollectionas an array and to index it using array notation. See theexam...
This interface was an attempt to create an unmodifiable list and only continues to be supported to not break code that's already using it. Modern APIs represent list structures using types based on JavaScript arrays, thus making many array methods available, and at the same time imposing additio...
JavaScript Array forEach() Method, The forEach() method calls a function for each element in an array. The forEach() method is not executed for empty elements. See Also: The Array map() Method. The Array filter() Method. Syntax. array.forEach(function(currentValue, index, arr), this...