javascript es2015 class

size images for different terminals, do not use the original image to reduce the replacement ICON, such as some picture services such as OSS. Use the appropriate image format, such as using the WEBP format. Detailed picture format comparison, use scenes and other suggestions to view the Web front-end picture limit optimization strategy. Load on demand and render images on demand. When preloading a picture, remember to assign the IMG object NULL, otherwise it will cause the picture m

Javascript class definition based on the OpenLayer toolbar management class MapCwgisToolBarClass. js // Define the toolbar management class // mapCwgisToolBarClass. js // vp: hsg // create date: 2013-07-31 // modify date: 2013-08-01 // defines the global variable var cmToolbar = null; // plug-in call method cmToolbar.

In our daily web development and Web application development, we often need to effectively call JavaScript processing date and time format-related functions, in JavaScript has included some of the most basic built-in processing methods. In our daily web development and Web application development, we often need to effectively call JavaScript processing date and t

Http://www.cnblogs.com/ciangcic/p/3526957.htmlBrief introductionIn many traditional languages (c/c++/java/c#, etc.), functions are present as a second-class citizen, you can only declare a function with the keyword of the language and then call it, if you need to pass the function as a parameter to another function, or assign to a local variable, or as a return value, You need to go through a special way, such as function pointers (functions pointer),

JavaScript allows you to change the class or id of an element. After you change the style, the browser automatically updates the style of the element. Is className, not class Note that JavaScript uses className to access the class attribute, because

JavaScript learning"Arrays in JS"1, the concept of arrays: The order in which the elements of the structure of an ordered element are sequentially stored in memory is called subscript, and the object element is looked up by subscript.2, the declaration of the Array: ① literal declaration: var arr1 = [];js, the same array, can store many different data types: for example: var arr1 = [1, "2", true,{"name": "hahhah"},[1,2]]②new keyword declaration: var a

In daily website development and web application development, we often need to effectively call functions related to date and time formats for Javascript processing, javascript contains some of the most basic built-in processing methods. In daily website development and web application development, we often need to effectively call functions related to the processing Date and Time Format of

I. Overview In Java, we can define our own classes and create objects based on these classes for use. In Javascript, we can also define our own classes, for example, define the User class and Hashtable class. Currently, some standard classes exist in Javascript, such as Date, Array, RegExp, String, Math, and Number, wh

Copy Code code as follows: /*----------------------------------- WEB Application JavaScript Library 2009.11 Janchie ------------------------------------*/ String native object extension empty left and right space String.prototype.trim = function () { Return This.replace (/(^[\s\n\t\r]*) | ( [\s\n\r\t]*$)/g, ""); }; Date native object Extended formatted output Date.prototype.format = function (string) { var self = this; var p = functi

A complete example of the Map set tool class implemented by Javascript, and a map tool class This example describes the Map set tool class implemented by Javascript. Share it with you for your reference. The details are as follows: Var Map = function () {// construct the ent

This article mainly introduces the implementation methods of classes and instances in JavaScript. it cleverly simulates the implementation process of classes and instances and has some reference value, for more information about the classes and implementation methods in JavaScript, see the examples in this article. Share it with you for your reference. The details are as follows:

Reference Nanyi's article: http://javascript.ruanyifeng.com/oop/inheritance.html#toc4functionShape () { This. x = 0; This. y = 0;} Shape.prototype.move=function(x, y) { This. x + =x; This. Y + =y; Console.info (' Shape moved. ');};functionRectangle () {Shape.call ( This);//calling the parent class constructor}//Another way of writingfunctionRectangle () { This. Base =Shape; This. Base ();}//subclass inherits methods of parent classRectangle.prototy

What is the prototype chain??? The concept of C/c++/java class has been deep in my heart, and suddenly this is not suitable. What's the use?And see the back ES6 grammar, unexpectedly also joined the class?????What the hell? Isn't that a hit on your face?Maybe there's something useful in the back, but I haven't found it yet.A brief explanation of the prototype chain78655038Class inheritance is through the pr