JavaScript

hasOwnProperty: is used to determine whether an object has a property or object that you give a name to, and this method cannot check whether the object has that property in its prototype chain, and that property must be a member of the object

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,

1. js Array loop traversal.Array loop variables, the first thing to think about is the for (Var i=0;iBoth Firefox and Chrome's array types have a foreach function. Use the following: New Document &L t;/title> But the above, the code in IE

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

To create tags dynamically:Traditional methods: Document.Write, InnerHTMLDocument.Write: The method can easily and quickly insert the string into the document, but the disadvantage is that it violates the principle that "behavior should be separated

Scope of function: calling ObjectThe body of a function in JavaScript is performed in a local scope, which differs from the global scope. This new scope is created by adding the calling object to the head of the scope chain (this sentence is not

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

This regular expression collects in the network, but that website even copies all need to register the member, despises it, therefore does not mention him. Also, the original author could not be the site.The HTML tag has this pair, also has this

Original: What does the settimeout (fn,0) under JavaScript mean?I'm very sensitive to settimeout and stuff like that in the recent study of asynchronous programming. On the segmentfault saw a problem "about settimeout time set to 0 o'clock": the

Ext.: http://www.ibm.com/developerworks/cn/web/wa-oojavascript/The JavaScript language contains several inline objects, just to name a few, such as Array , String and Date . However, if you want to create custom functions, you can use one of the

In a Web project, the interaction between the client and the server can be implemented by means of cookies, hidden frames, HTTP requests, LiveConnect requests, and smart HTTP requests.A CookiesCookies are the means by which the first JavaScript can

Front-end CSS naming rules and CSS naming rules This article summarizes various CSS specifications in Web Front-end development, including file specifications, annotation specifications, naming rules, writing specifications, and test specifications.1

How JavaScript converts the current time to the UTC Standard Time Here, JavaScript is used to convert the current time to the UTC Standard Time. Beijing is in the GMT + 8 zone, and 8 hours are deducted from Beijing time. 1 2 3 4 5

Css details review notes-structure and cascade, css details review Cascade Each legal document generates a structure tree, with the ancestor of the Structure Tree element, the attribute sibling element, and so on, creating a selector to select the

Shell script for Linux system and process resource monitoring, shelllinux During server O & M, you often need to monitor various Server resources, such as CPU load monitoring, disk usage monitoring, and process count monitoring, to promptly notify

How to Use npm to publish the Node. JS package This article describes how to use npm to publish a Node. JS package. This article describes how to configure package. json, register an npm account, and publish a package. For more information,

EasyUI: Click the Enable Edit box and the edit box to get the focus. The easyui edit box appears. Copy codeThe Code is as follows:OnClickRow: function (rowIndex, rowData ){Var editor = $ ('# datagrid'). datagrid ('geteditor', {index: rowIndex,

How to Use AngularJS to create a single-page application This article describes how to use AngularJS to create a single-page application. AngularJS is a popular JavaScript library. For more information, see Overview Single-page applications are

The Math. sin () method in JavaScript is described in detail, and javascriptmath. sin This method returns the sine of a number. The sin method returns a value ranging from-1 to 1, representing the sine of the parameter.Syntax Math.sin( x ) ; The