JavaScript

Canvas converted to Dataurl (get dataurl from canvas)var dataurl = canvas.toDataURL(‘image/png‘);Convert file object to Dataurl, Blob object to DataurlThe file object is also a Blob object, with the same processing.function readBlobAsDataURL(blob,

JavaScript BOMFirst, BOM (the Browser objectmodel):-Browser object model,(1) The BOM provides objects that are independent of the content and interact with the browser window.(2) The BOM is primarily used to manage the communication between windows

TIP: The content is extracted from the JavaScript authoritative guide, and students who have read the book can ignore this article.How to access the properties of an object:obj.attr;obj["attr"];The most important difference between the two is that

The unescape () function decodes a string encoded by escape ().GrammarUnescape (String) string is required. The string to decode or reverse.return valueA copy of the string that was decoded.DescriptionThis function works by finding a sequence of

For a drop-down list select, it is well known that the value is the value in the selected option, but what if you need to take out the display value of each option? While it's not necessary to take the option's display value, if you do need the

I. Object-oriented technology in JavaScript (solving how to use the fatigue in JS programming)1. Examples of collection classesThe collection represents a non-repeating unordered collection. Two basic methods: A. Add to Collection B. Whether in the

I. Classes and modules1. The implementation of the class is based on the prototype inheritance mechanism.Two. Classes and prototypesThree. Classes and constructors1. The constructor is used to initialize the newly created object.2. Use new, so the

ObjectiveRecently I was looking at some JavaScript asynchronous things, but because of the limited time, just looked at the head, had to stop halfway. In order to facilitate the future inspection for re-pick up, then recorded a little experience, if

1, download Jasmine package, mainly includes the following three files:1>,jasmine-html.js,jasmine.css,jasmine.js2>, write the test case with the following code:Describe ("Examples of Jasmine Suite", function () {//list 1 describe ("This was an

I. Constructor call (with or without return)1. var obj = new Object ();var obj = new Object;The two lines of code are equivalent; expression: New obj.m ();, this is not obj!! The constructor is usually not used with the return keyword;Two. Indirect

Js sets document. domain for cross-domain attention analysis, jsdocument. domain This article analyzes the precautions for setting document. domain in js to implement cross-origin. Share it with you for your reference. The specific analysis is as

Js achieves slideshow image effects that support mobile phone sliding Switching This example describes how js achieves slideshow effects that support mobile phone slide switching. Share it with you for your reference. The details are as follows: The

JavaScript uses pointer operations to implement Joseph's problem instance, javascript Joseph This article describes how to implement Joseph's problem using pointer operations in JavaScript. Share it with you for your reference. The specific analysis

JQuery creates an excellent accordion folding menu and jquery accordion The accordion folding menu created by pulling wind's jQuery has a very good effect! Here is the release version of the previous version, mainly for jquery code improvement Demo

Thoughts on front-end framework and front-end class library in Web Development This article mainly introduces some ideas about front-end frameworks and front-end class libraries in Web development, this article explains the misunderstanding of the

Common Html tags and common Html tags HTML is the carrier of webpage content. The content is the information that the webpage maker places on the page to allow users to browse, including text, images, and videos. Html tags are combined into a

JavaScript timer and optimized cancel timer method, javascript Timer Common Methods:Start Timer:Copy codeThe Code is as follows:Window. setInterval (Method, Time) Method is the js Method that is periodically called. Time is the interval, in

JS verification IP address, subnet mask, Gateway and MAC Method, jsmac This article describes how to verify the IP address, subnet mask, gateway, and MAC in JS. Share it with you for your reference. The details are as follows: test IP

Node. js event-driven, node. js event Node. js event-driven implementation Overview Although the ECMAScript standard does not (and is not necessary) specify "Events", in the browser, Events Act as an extremely important mechanism, provides

JS makes the mobile terminal auto scaling display, js makes auto Scaling JS makes a mobile terminal adaptive scaling display Example 1: Example 2: Example 3: Summary: I. In fact, it is not difficult. First, add a line of viewport meta tag to the