JavaScript

Init-time branching the initial period branch is an optimized mode. If certain conditions do not change after the program is started, then we only need to check it once during the initial period, not every time we need to use these conditions. For

HTML codeDOCTYPE HTML>HTML>Head>MetaCharSet= "Utf-8">title>Jstesttitle>Linkrel= "stylesheet"type= "Text/css"href= "Style.css"/>Scripttype= "Text/javascript"src= "Js.js">Script>Head>Body> DivID= "box"class= "Red">Test DivDiv> Body>HTML>CSS

The point of the phrase "Everything is Object" is how to understand the concept of "object".--Of course, not all of them are objects, and value types are not objects.First of all, let's look at a common function--typeof () in JavaScript. typeof

1. Normal cycleThe usual loop notation in JavaScript is this:Sub-optimal loopfor (var i = 0; i The problem with this notation is that each loop needs to read the length property from the MyArray object, which can cause a large performance problem

As shown, the gray block contains a red block, assuming we have a click-to-box event for each of the gray and red blocks, and when we click on the red block, we do not want to trigger the gray block of the bounding box event, which requires blocking

Grunt is the building tool for the JavaScript world.Why use build tools?Word: Automation. For tasks that require repeated repetition, such as compression (Minification), compilation, unit testing, linting, and so on. Automated tools can ease your

Array Object Properties Properties Description Constructor Returns a reference to the array function that created this object. Length Sets or returns the number of elements in the array.

String, number, Boolean, array, object, Null, Undefined JavaScript has a dynamic type JavaScript has a dynamic type. This means that the same variables can be used for different types: Example var x//X is Undefinedvar x = 6;      X is the number

Once you assign a function object to a variable, you can define the function again by this variable, and even define itself again within a function:var scareme = function () { alert ("Boo!"); Scareme = function () { alert ("Double boo!")

A detailed description of this in JavaScriptThe this in JavaScript is always confusing and should be one of JS's well known pits. Personally also think that JS in this is not a good design, due to this late binding characteristics, it can be a

The CommonJS, AMD, NodeJS, Requirejs, Seajs, Curljs and other modular JavaScript concepts and libraries have come to the fore, and have to admit that for the front-end JavaScript code Organization is a great change. This article mainly refers to

Original digest self of front-end blog, welcome everyone to visitHttp://hacke2.github.ioCauseJust now Caigo let me restart the Linshui Project Server, and I reviewed the project I did last year. At that time, my mission is the park dynamic +

Multiple methods of writing anonymous functions in JavaScriptIf an anonymous function has no actual name or pointer, how can this problem be solved?In fact, you can understand the meaning of parentheses. Parentheses return values, that is, the

Script custom property transfer configuration parametersAt the beginning of my formal career, I have been working on a unified header js for my company in the last few days. I thought of a method for passing configuration parameters through script

Js deep learning-code reuse of callback Functions In js, a code block is often used repeatedly in multiple places. This method is not conducive to code optimization, and it is also troublesome for personnel maintenance in the future, if the reuse

Js deep learning-differences between js prototype constructor attributes In many js plug-ins, these two attributes are frequently used. I also used them when I write plug-ins myself. I know how to use them, but I don't know the specific differences.

Dynamic Loading of js and css jquery plugin and jqueryplugin A simple jquery code that dynamically loads js and css. It is used to load common js and css files through js functions when a page is generated.Java code // How to use the function

[Original] iPhone 6 is coming. What should I do? iPhone 6 is coming. Apple officially released its next-generation product iPhone6 at on January 1, September 10, 2014, Beijing time. I believe that webapp developers are curious and waiting for it,

JQuery is automatically executed three seconds after the mouse stays in a certain area. This article mainly introduces how JQuery can be automatically executed when the mouse stays in a certain area for 3 seconds. It can be used in many scenarios.

Front-end development artifact sublime code emmet quick writing configuration file storage location, sublimeemmet 1. Open the path for installing sublime 2. Find the following path Data \ Packages \ Emmet \ emmet \ snippets. json. 3. Open the