JavaScript

What is JavaScript? JavaScript is designed to add interactive behavior to HTML pages. JavaScript is a scripting language (the scripting language is a lightweight programming language). JavaScript consists of several lines of

the principle of bubble sort:For example, there are five numbers 54321, to be arranged from small to large;First of all compare the first two, that is 5 and 4, if the first is less than the second, do not do the operation, if the first is greater

In terms of ease of development, now universal use of jquery, I learn jquery html CSS time is not long, previously written flex.Css+js+html compose HTML to develop the troika. Learn JS Development I think how to get started is very important.

JavaScript is a client-side scripting language that can help HTML implement some dynamic functionality.Example1. Loading a JavaScript filehead> scripttype="text/javascript"src="dreamdu.js">script>head>2.script tags--using scripts in documents

chaining calls to methodsstructure of the call chainYou are already familiar with the $ function. It typically returns a collection of HTML elements or an HTML element, as follows:function$(){ varelements = []; for(vari=0,len=arguments.length;ii)

Reduced reflux (reflows)When the browser re-renders the elements in the document, they need to recalculate their position and geometry, which we call reflux. Reflux can block the user's actions in the browser, so it is very helpful to understand how

First, the original data type: string, number, Boolean, null, Undefined, object. (Simple use (typeof xx) to judge)1) Basic Data type:A) string (string)Data base types (arguments) and reference types1. Define a string of basic data type var s = "xiao.

                                          Increase of array Ary.push () Adds an element to the end of the array, returning the length of the new array after the addition, changing the original array Ary.unshift () Adds an element to the

This points to the execution context when there are three situations in total;1. Initialize the global context--point to Window2. Enter eval mode1) Directly call Eval (),This point does not change the execution context, pointing to the current

1. What is object-oriented?JS in everything is the object! The bottom of all objects is like a hash array.In a program, an object is used to describe a specific thing in reality, so-called object-oriented is the instantiation of a class.One thing in

This article introduces JS development for the JavaScript Intensive tutorial seriesRecently, in an interview, I've seen a couple of these for loops. The first reaction is to be ignorant.After a closer look, there's no problem.First, the code is a

Margin BUG (2), marginbug After the last learning, I found the second bug of margin. The gap between the two adjacent div boxes cannot be displayed. Specifically, two div1 and div2 are created first. Set div2 to margin-top and div1 to margin-

A fixed four-byte table is used to scroll up or down the table, while the table is up or down. Problem: When I recently made project statistics, I met a specific requirement that the table head and tail should be fixed when the table is scroll up or

About the Position attribute and CSSPosition attribute in CSS The usage of static and relative is clear and will not be discussed here. It is worth noting that static positioning is ignored by default, that is, top, bottom, left, right or z-index

Use gulp-uncss to clear unnecessary useless css and gulp-uncss to useless css   Cnpm can also use npm Cnpm install gulp-uncss -- save-dev   Gulpfile. js Var gulp = require ('gulp'), uncss = require ('Gulp-uncss '); gulp. task ('uncss ',

Browser compatibility problems and countermeasures Preface: Last week, a senior student asked me to help me with three pages, because there was no data exchange or the like, just a front-end page. I thought that I had not done anything for a long

Use recursive traversal to obtain the value of the implementation method, recursive value To use recursion, You need to determine whether the object is the same as the parent type. Here we will demonstrate simple object recursion, and array

Asynchronously load JS, CSS code (recommended), jscss You can understand my style. The details are as follows: The key code is as follows: function AsyncLoad(V_tag,V_src){if (V_tag == "script") {var s = document.createElement('script');s.type =

JavaScript: Click the text to automatically locate the selected operation in the drop-down box. The javascript drop-down box The examples in this article share with you the specific code selected in the drop-down box by clicking on the js text for

Javascript scope and scope chain (required by cainiao) and javascript The scope and scope chain of javascript are the most painful part of my learning, because I spent a lot of time reading a lot of technical documents and did not understand it. I