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
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....
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 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...
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...
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 ...
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.
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 ...