JavaScript

This article illustrates the effect of Javascript+canvas implementation Chiseban. Share to everyone for your reference, specific as follows: The effect chart is as follows: Html: Css: html,body{margin:0;padding:0} .

Learn about RegExp types: ECMAScript supports regular expressions by RegExp types. var expression=/pattern/flags; Pattern section of regular expressions: can be any simple or complex regular expression that can contain character classes,

The resolution callback function is nested too deep, parallel logic must be serially executed, a promise represents the end result of an asynchronous operation, and the main way to interact with promise is to register the callback function through

First, the factory model function Person (name,age) { var p=new Object (); P.name=name; P.age=age; P.showmessage=function () { console.log ("Name:" +this.name+ "Age:" +this.age); } return p; } var P1=person ("K1"); var

One, JavaScript is the Object-oriented programming language Encapsulation: the ability to store relevant information, whether data or method, in an object Aggregation: The ability to store an object within another object Inheritance: The ability

A brief introduction to queues and stacks 1.1, the basic concept of the queue 　　Queue: is a set of advanced first Out (FIFO), that is, the first inserted data, first taken out! As shown in the following illustration: 1.2, the basic concept of

Recommended reading: JavaScript form verification length JavaScript Form validation-Submitting a form JavaScript form Validation-the first recognition of regular expressions JavaScript form Validation-uncovering the veil of the regular expression

This article introduces the JavaScript array iterative method for everyone to refer to, the specific contents are as follows Each method receives two parameters: the function to run on each item and (optionally) the scope object to run the function.

Recently done a project, which has about JS data types of processing, search the relevant information on the Internet, and personally tested a variety of data types of judgments, absolute security. The following small series to the specific content

The examples in this article describe the common method of digital conversion in JavaScript. Share to everyone for your reference, specific as follows: The basic idea is to first convert the other into decimal, and then convert. This process uses

Taobao Photo Processing discussionTaobao is a big page, but it's very fast to open. The image processing is to use a rolling load, that is, where the scroll axis roll, where the picture is loaded. But you want to see his source code, it costs

In JavaScript, arrays can be created using the array constructor, or created quickly using [], which is also the preferred method. An array is a prototype that inherits from object, and he has no special return value for TypeOf, and he only returns '

In this article, we will take a closer look at the most basic and important concepts in execution context-JavaScript. After reading this article, you will understand what the JavaScript engine does inside the code before executing it, why some

After the user fills out the form submits, the server-side script verifies the data first, guarantees the data correctness (for example, the data conforms to the request content, the format is correct, etc.) and then the data to the database storage

Jquery uploadify redundant Get request (404 error) solution, jqueryuploadify If you do not set the button_image_url parameter when using jquery uploadify, some extra get requests may occur, or even 404 errors may occur. This is a bug in this

RequireJS dependency instance (recommended) and requirejs instance Now let's take a look at the neat features of RequireJS: The following is an html page: configuration At most one script statement introduces the require. js file

Drag-and-drop sorting of applets (code sharing) Index. wxml {{item.content}} Index. js // Index. js // obtain the application instance var app = getApp (); var x, y, x1, y1, x2, y2, index, currindex, n, yy; var arr1 = [{content: 11, id: 1},

Vue uses native js to implement automatic generation of custom components, vuejs For the current three mainstream front-end data driver frameworks (vue, ng, react), all have APIs for creating custom components, but they must first write the mount

Vue. js custom command usage and instance parsing, vue. js Parsing Most of the Articles on Vue. js custom commands on the market talk about syntax and seldom talk about actual application scenarios and use cases. Even if you understand how to write

The container component details and instance code in the applet view, and the applet View Details about the container components in the applet View: The applet provides three view container components: , , and : 1. view container is equivalent to