To loop through all DOM elements: Use the getElementsByTagName() method to get an HTMLCollection containing all DOM elements. Use a for...of loop to iterate over the collection. Here is the HTML for the examples
function text(e) { var t = '' ; // If an element was passed, get its children, // otherwise assume it's an array e = e.childNodes || e; // Look through all child nodes for ( var j = 0; j < e.length; j++ ) { // If it’s not an element, append its text value /...
The HTMLCollection is an array-like object that has a length property. As a result, we can loop through it like a regular array. To loop through the HTMLCollection object, we can use afor looplike so: //Get every HTML element that has the CSS class "inactive" var elements = document....
The length property defines the number of elements in an HTMLCollection:Example myCollection.length Try it Yourself » The length property is useful when you want to loop through the elements in a collection:Example Change the text color of all elements: const myCollection = document.getEleme...
在控制台选项卡中运行以下代码将打印一个包含 21 个项目的HTMLCollection对象: document.getElementsByClassName('item') 让我们打开第一个,看看里面有什么: document.getElementsByClassName('item')[0] 现在你看到 Chrome 打印了一个 DOM 元素,如果你在上面悬停,你会看到它在屏幕上被突出显示。你也可以打开在控制...
JavaScript 语言是在 1994 年创建的,旨在使 Web 浏览器显示的文档具有动态行为。自那时以来,该语言已经发生了显著的演变,与此同时,Web 平台的范围和功能也迅速增长。今天,JavaScript 程序员可以将 Web 视为一个功能齐全的应用程序开发平台。Web 浏览器专门用于显示格式化文本和图像,但是,像本机操作系统一样,浏览器还...
HTMLCollection 没有也不会;事实证明,添加它们会破坏网络上的太多代码。 Both NodeList and HTMLCollection are iterable , though, meaning that you can loop through them with for-of , expand them into an array via spread ( [...theCollection] ), 等。但是如果你在浏览器上运行 NodeList 没有forEach ...
Add Deep Anchor Links to Your Blog using JavaScript #JavaScript#jQuery 九月15, 2018 How to smooth scroll to a page section with jQuery #JavaScript#jQuery ✨ Learn to build modern web applications using JavaScript and Spring Boot I started this blog as a place to share everything I have lea...
Just like NodeList, the HTMLCollection also supports the length property that returns the total number of elements inside the collection:const elems = document.getElementsByTagName('p') // print total elements console.log(elems.length) The length property is useful when you want to loop through ...
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.