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The window.postMessage() method allows scripts from one document to pass text messages to scripts in another document, regardless of whether they are cross-domain or not. Scripts in one document still cannot call methods and read properties in other documents, but they can communicate securely using this messaging technique. This technique is called “Cross Document Messaging”, […]

js generates random numbers usually using the Math.random() function of javascript Several commonly used methods: Math.random() means: the result is between 0-1 (including 0, excluding 1); Math.floor(Math.random()*10+1) indicates that the result is a random number between 1-10 Math.floor(Math.random()*24) means the result is a random number between 0-23 1.Math.random(); returns a random number between 0-1, may

js to get two methods of custom attributes Four ways to get properties First get an element: var elem = document.getElementById(‘elem’); 1 1. Point (can not get custom attributes): 2. [] can also get attributes, which is beneficial for parameter transfer operations. elem.style[‘background’] = ‘yellow’ 1 3. getAttribute(): The early method of obtaining custom attributes.

This article mainly introduces the implementation of dragging and collision detection in js in detail. The sample code in the article is very detailed and has certain reference value. Interested friends can refer to it. The example in this article shares the specific code of js for dragging and collision detection for your reference. The

const getCookie = (name) => document.cookie.match(`[;\s+]?${name}=([^;]*)`)?.pop(); // For example, the cookie is as follows: a=b; c=d // use getCookie(‘c’) // d where match is the prototype method for strings. str.match(regexp) If a non-regex object is passed in, it is implicitly converted to a RegExp using new RegExp(obj) The above, so there is no need to

Guided reading find is a handy tool to find files on your system. Files that have been changed in the last few days can be found. This will be the focus of this tutorial. Timestamp type of the file file with the following timestamps: atime: Displays the last time the file was read or accessed.

Next.js 13 is out now and some of the highlights include: app/Directory (beta): Simpler, faster, less client-side JS. Layouts React Server Components Streaming Turbopack (alpha): A 700x faster Rust -based alternative to Webpack. New next/image (stable) : native browser lazy loading faster. New @next/font (beta) : Automatic self-hosted font with zero layout offset. Improve next/link: