JavaScript

The finishing of the knowledge points is not comprehensive but very practical.The main points are three pieces:(1) JS Code Pre-parsing principle (including three paragraphs);(2) function correlation (including function parameter, call mode with

From:http://www.jb51.net/article/71532.htm In JavaScript, Void is an operator that specifies that an expression is evaluated but does not return a value. I'd like to use Ajax for all the usual code like this: The code is as follows: here But what is

Method One: This is very good, it seems that Csdn's Meizz wrote://An extension to date that converts date to a string of the specified format//the Month (m), Day (d), hour (h), Minute (m), second (s), quarter (q) can be used with 1-2

vararr = [1, 2, 3, 5, 5, ' 45 ', ' 45 ', 4, 1, ' 1 ', ' 2 '] for(vari = 0; I ) {Arr.push (i)//This adds 10000 entries to arr, allowing you to view the performance of each method later } /** Method One: Borrowing an array of results, the

JavaScript itself does not determine whether a variable is a null function, because the variable may be string,object,number,boolean and other types, different types, and the judging method is different. So in the article wrote a function, to

For Chinese developers in the creation of GIS applications, often the headache is the lack of basemap resources. In fact, the National Survey and Mapping Bureau to provide a good free resources: heaven and Earth map. Developers using the ArcGIS API

(1) new features of the standard library1. Meta-programming① Getting and setting prototypes--object.create ()--object.getprototypeof ()② managing property attributes with property descriptors--object.defineproperty ()--object.defineproperties

Recently in-depth practice js, encountered some problems, such as I need to create a dynamic DOM element binding event, then the ordinary event binding is not, so through the Internet to check the data to understand the event delegate, so want to

Today we see deep clones and require programming on the prototype Chain.So the whim simply to review this knowledge pointCloning objects , this noun looks tall, actually also nothing, is to copy a long identical objectMaybe it's not easy to have a

1th Chapter Make yourself accustomed to JavaScript1th: understand the JavaScript version you useDecide which versions of JavaScript your application Supports.Make sure that the JavaScript features you use are supported for all environments that your

The following are the implementation ideas, have been tested, for referencevar allset = document.getElementById (' Allset '); Get the Select All button element var a = allset.custom; Custom properties for the Select All button a = 0; Custom

In JavaScript, I will give a brief description of ajax text and text, and use javascriptajax. 1. ajax entry case 1.1 build a Web environment Ajax should be familiar to you. It is precisely because of ajax that it makes data transmission between the

SetTimeout in JavaScript: settimeout in js 1. setTimeout: single thread  For a long time, we have been saying that Javascript is a single thread. No matter when the browser is running, there is only one thread running JavaScript programs. However, I

In jQuery, checkbox repeatedly calls attr ('checked', true/false). Only the solution that takes effect for the first time is jqueryattr. The example in this article describes how checkbox repeatedly calls attr ('checked', true/false) in jQuery to

Proportional Scaling (image adaptive screen) and adaptive Scaling Proportional scaling of Applet Images In the morning, I saw an article on proportional scaling of images on the forum. I only checked whether the image width is greater than the

Use Vue. js to change the listener attributes. Preface When a Vue instance is created, the Vue traverses the data attributes through the ES5Object.defineProperty Convert them to getter/setter. In the Vue, you can track dependencies and notify

Select All or invert settings for the checkbox in the list, and select all for the checkboxSelect all settings for checkbox selection in the list 1 2 3 51 52 53 54 55 56 57 58 59 60 61 th> 62 billing item 63 bills number of

Front-End-HTML-framework element-same-domain access, front-end-html-framework HTML element classification-framework element-same-domain access 0. : Specifies an inline framework. An inline framework is used to embed another document in the current

Sort out the layout scheme ideas and layout scheme ideas Previously, I wrote a blog Based on Netease's front-end micro-major courses. Horizontal center plan Vertical center Scheme Horizontal and vertical center plan   At last, the teacher

Javascript simple canvas development, javascript canvas The examples in this article share with you how to create a simple javascript canvas for your reference. The specific content is as follows: Html: clear all stroke colors font size: 10px