JS: four methods to obtain the parameter value (QueryString) in a URL

Method 1: Regular ExpressionCopy codeThe Code is as follows: function getQueryString (name ){Var reg = new RegExp ('(^ | &)' + name + '= ([^ &] *) (& | $)', 'I ');Var r = window. location. search. substr (1). match (reg );If (r! = Null ){Return

Use the data () method in jQuery to read the data-* instance of the HTML5 custom attribute

The main method is as follows:Copy codeThe Code is as follows:. Data (key, value). Data (obj). Data (key). Data ()From jQuery 1.4.3, the data-attribute of HTML 5 will be automatically referenced to the data Object of jQuery.For example, HTML:Copy

How does javascript determine whether the entered url is correct?

There are too many advertisements on the original webpage, which affects your mood.Copy codeThe Code is as follows: check whether the URL is used

Json format for reading and writing javascript code

JSON (JavaScript Object Notation) is a simple data format, which is lighter than xml. JSON is a JavaScript native format, which means that no special API or toolkit is required to process JSON data in JavaScript.JSON rules are simple: the object is

Waterfall stream layout code example

Copy codeThe Code is as follows: waterfall stream layout Code This is the title part of the text image height image height image height image height image height image height image height image height the position

How to parse Jquery + asp.net background data uploaded to front-end js

We often use jquery to read background data and return data in the background. There are many background data formats, but there are no different types in js. Therefore, when parsing background data, we need to handle and handle it according to

Three methods for js image rotation

1. Implement using jQueryRotate. jsSample Code:Copy codeThe Code is as follows: Test results: the img object in chrome is normal, and the img object is still img object after rotation. The img object in ie8 is normal, but the img object becomes

Js get video duration code

I found it online because I recently used it, but I have not tried it.Copy codeThe Code is as follows: untitled document

JavaScript Form Verification

1. form number range Verification: border-bottom-width: 0px;" cellpadding="0" cellspacing="0"> Latitude:360) {this. value = 360;} ">& Nbsp; degree & nbsp; & Nbsp; points & nbsp;>& Nbsp; seconds

Javascript Object Reference Note

When using forEach and other statements in js to form a loop class, the outer object is referenced, and the loop body is constantly assigned an attribute to this object, the final operation is the final value of this attribute after the loop. Eg:

Simple induction of JSON usage

JSON Definition JSON (JavaScript Object Notation) is a lightweight data exchange format that is easy to read and write, and easy to parse and generate by machines. It is based on a subset of the JavaScript programming language in the ECMA262

How does JavaScript obtain the date such as yesterday and tomorrow?

Sometimes we need to know the date of yesterday, the day before yesterday, tomorrow or the day after tomorrow. The following program can achieve this requirement. It is not complicated at all, mainly because you are familiar with the use of the

View object content in JavaScript

JavaScript is a programming language based on objects. outputting the internal structure of JavaScript objects makes debugging easier. The following describes how to view the internal structure of an object so that you can view the attributes and

JavaScript to get the size of the browser window

Program Demonstration: Obtains the current window size of the browser. When the browser window size changes, the displayed value changes at any time. The program mainly uses some properties of the Document Object about the window. The main

How to dynamically load js files as needed

JavaScript is nothing more than introducing the script tag to the page. But when the project grows, N JavaScript codes are introduced to a single page. merging a single file reduces the number of requests, however, the requested file volume is large.

Native powerful DOM selector querySelector

In traditional JavaScript development, DOM searching is often the first headache for developers. There are not many DOM selection methods provided by native JavaScript, but only through tag, name, id, and other methods to search, which is obviously

Relatively complete JavaScript countdown script

JavaScript countdown is widely used on the Web, such as common group buying and other things worth looking forward. Here are four examples, such as long countdown, hourly countdown, simplest countdown, and stopwatch.1. Relatively long

Use native JavaScript For a drag effect

The Drag status is x: 0, y: 0 Drag me.Any directionHorizontal DirectionVerticalStop draggingEnable dragRestore initial status Basic drag: New Dragdrop ({target drag element HTMLElemnt required bridge: Specifies the drag start when the mouse is

What is the performance of using arrays to splice strings in JavaScript?

Traditionally, string connection has always been one of the operations with the lowest performance in js. var text="Hello";text+=" World!"; Early browsers did not optimize this operation. Because the string is immutable, this means that you need

. NET System. Drawing. Color list

AliceBlue ARGB = (255,240,248,255) HEX = "# f0f8ff" AntiqueWhite ARGB = (255,250,235,215) HEX = "# faebd7" Aqua ARGB = (255,255) HEX = "#00 ffff" Aquamarine ARGB = (255,127,255,212)

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