JavaScript

This week ' s JavaScript News Read this issue on the Web | Issue Archive JavaScript Weekly

This week ' s JavaScript News Read this issue on the Web | Issue Archive JavaScript Weekly Issue 182May 23, 2014

1.eval function JSON text converted to objectIn order to convert the JSON text to an object, you can use the Eval function. The Eval function calls the JavaScript editor. Because JSON is a subset of JavaScript, the compiler will parse the text

First, typeofThe variables in JS are loosely typed (i.e., weakly typed) and can be used to hold any type of data.typeof can be used to detect the data type of a given variable, the possible return value:1. ' Undefined '---this value is undefined;2. '

(1) Succession of Ext.define extendSpecific examples:Ext.onready (function () {//sup class parent ext.define (' person ', {config:{name: ' BJSXT '}, constructor:function (config) {var me = this; Me.initconfig (config);}); /sub class Subclass

Java code function DisableF5 () { With (event) { //F5 and Ctrl+r if (keycode==116 | | (Ctrlkey && keycode==82)) {    Event.keycode = 0; Event.cancelbubble = true; return false; } } } Document.onkeydown = DisableF5;

Share the method of reading the node data using JavaScript to read the XML file.Read the node data, another case is to read the node property data.

Angular implements permission control in the frontend and backend separation mode-Based on RBAC (1) Role-Based Access Control (RBAC) is a common design of permissions. The basic idea is that permissions for system operations are not directly

JavaScript closure function to access external variables, javascript Variables A closure is a function that has the right to access the variables in another function scope. However, the configuration mechanism of a function scope must be noted that

In IE, when JavaScript is used to call form. submit (), the system prompts "the object does not support this attribute and method" This is a magical problem that we accidentally encountered in the project today. First, let's take a look at the

Location object attributes in html documents and common usage, A simple understanding of location objects: 1. The location object contains the url Information of the currently loaded html document. 2. The location object is an attribute of the

Nodejs is a simple chat server. The implementation code is as follows: Var net = require ('net'); var chatServer = net. createServer (), clientList = []; chatServer. on ("connection", function (client) {client. name = client. remoteAddress + ":" +

Matplotlib can be used to create beautiful and precise mathematical graphs: However, sometimes you don't want to be so rigorous and formal when talking about ideas. You want to use a simple, graffiti-style image: The MATLAB XKCDify project can

Original form value acquisition method (manual ): $. Ajax ({type: "POST", url: "ajax. php ", data:" Name = extract star & position = IT technology ", success: function (msg) {alert (msg) ;}, error: function (error) {alert (error );}});  JQ serialize

Common JS framework jQueryDOJOExtJSPrototypejQuery framework concept: WRITELESS, DOMOREjQuery1.4 enterprise mainstream version, from jQuery1.6 to introduce a large number of new features, the latest version 1.8.3jQuery provides jquery-1.8.3.js and

In Java, there is an old code like this: Java code classRound {publicvoiddrawRound (); // circle} now the new Code wants to coexist with it and use a Person object to control it, however, it may be drawRound or drawRect: Java code class...

In the previous article, I ended the creation of objects and finally introduced the issue of scope chain and execution environment. When I have a deeper understanding of this knowledge, I will look back at the jQuery source code to know how powerful

The compatibility of css in different browsers is a headache. The basic idea of the first graph is as follows: 1. The datagrid is enclosed in a large div, which includes the header, title, body, and footer departments, each part is a div2, and the

When filtering, find the jQuery object corresponding to a dom object from the jQuery object that contains one or more dom objects, and then perform operations 1, $ (& quot; p & quot ;). eq (-2) Select the jQuery object corresponding to the last and

1. method for creating an Array object: --- & gt; vararr [, 3]; // a simple definition method. Now you can know that arr [0] 1; arr [1] 2; arr [2] 3; --- & gt; newArray (); vararrnewArray (); // defines an array object without any content, however...