JavaScript

Use = = = and!== instead of = = and! =Comparison operators perform calculations using the ToBoolean method to cast the data type and follow these rules:The computed value of object is TrueThe computed value of undefined is falseBoolean evaluates to

Now there are more and more free (JS chart) JavaScript graph drawing plugin on the network. I previously made a complex graphic for a website, and we used Highchart. During that time, there were not many plugins to choose from. But now that's

Inheritance, also not really strictly object-oriented inheritance, but through the prototype chain in JavaScript to implement the properties between functions, method sharing. Here's a simple way to share several packages.Since we're talking about

This article comes from Uncle TomObjectiveWhen you learn JavaScript, you often encounter code that executes anonymous functions, and today we mostly think about self-executing.Before learning more about this, let's talk about the

Unlike class-based programming languages such as C + + and Java,javascript, inheritance is based on prototypes. And because JavaScript is a very flexible language, there are many ways to implement inheritance.The primary basic concept is about

You need to be a Facebook app ID before you use the app, which doesn't have to be said.Initialize Facebook information in JavaScript after generating the Facebook APP IDAnd I've defined some of the global variables I need to get the data.Copy

Preface--Speaking in frontI think there are a lot of beginners who have seldom been in touch with the background programming language before, like me, the confused of a series of "nouns" in JavaScript. Seems to know what to say, but in fact the

One1. Get formvar form = Document.queryselector (' #formId '); var form = document.forms["FormName"];2.button:submit commits and Form.submit () submissions in JavaScript code the subtle differences Submit-->3. Two ways of repeating a

1. Type analysis: JS data types have undefined,boolean,number,string,object, such as 5, the first 4 are the original type, the 5th is the reference type. Code: varA1;varA2= true;varA3= 1;varA4= "Hello";varA5= NewObject ();varA6= NULL;varA7=NaN;varA8=

Js achieves slideshow image effects that support mobile phone sliding Switching This example describes how js achieves slideshow effects that support mobile phone slide switching. Share it with you for your reference. The details are as follows: The

Emmet plug-in: Quick compilation of HTML/CSS code, emmetcss     The predecessor of Emmet plug-in is the famous Zen coding. If you are engaged in Web Front-end development, the plug-in will not be unfamiliar. It uses the syntax similar to the CSS

Correct use of margin: 0 auto and body {text-align: center;} to implement element center (convert) and margintext-align What are the similarities and differences between body {text-align: center} and margin: 0 auto? Text-align is used to set or

Node. js crawlers crawl garbled data. node. js crawlers crawl garbled data. 1. Non-UTF-8 page processing. 1. Background Windows-1251 Encoding Such as Russian site: https://vk.com/cciinniikk Shameful discovery is this encoding Here we mainly talk

In ie8, jquery changes the opacity of PNG to a black edge. in ie6, the png transparency solution is ie8jquery. Currently, the Internet has higher and higher requirements on web page effects, and it is inevitable to use PNG images. PNG is divided

JS verification IP address, subnet mask, Gateway and MAC Method, jsmac This article describes how to verify the IP address, subnet mask, gateway, and MAC in JS. Share it with you for your reference. The details are as follows: test IP

IE8 + compatibility experience and ie8 compatibility Recently, I have used the Flask + Bootstrap3 framework combination for development. This article describes how to solve IE8 + compatibility issues in this technical combination. Based on my

A: link, a: visited, a: hover, a: active, visitedhover 1: Explanation Link: normal connection status Visited: after the connection is accessed Hover: When the mouse is placed on the connection Active: when the connection is downDetails:: Hover

Stereo buttons implemented by CSS3 and stereo buttons implemented by CSS3 stereo buttons implemented by CSS3 http://www.999jiujiu.com/ front-end engineer

Javascript + html5: How to Use canvas to draw empty text in a canvas This document describes how to use JavaScript + html5 to draw empty text in the canvas. Share it with you for your reference. The specific implementation method is as follows: ?

Implementation of extend in jquery Generally, when we use the extend of jquery, most of them are used to overwrite the default field. That is, if the value of a field is input, the input value is used; otherwise, the default value is used. The