JavaScript

A cache framework is a good framework. The following small series will introduce how to use the cache in yii2 through this article. It is of great reference value. If you are interested, you can learn it together. A good framework is definitely

Returning to the top of a website is helpful for enhancing user experience. When a page is very long, returning to the top is essential. Back to the top button, you can use the image, background image, vector font icon, or code css to generate. Here

Learn Javascript with 9 mind maps Learn Javascript with 9 mind maps The learning path is to constantly sum up and summarize, and the good memory is not as good as the bad pen. so, the following will be the 9 javascript-related mind maps I have

JAVASCRIPT gets the IE version number and HTML sets the IE document mode JavaScript gets the IE version code: var gIE = getIE(); alert(gIE.version) function getIE() { var rmsie = /(msie) ([\w.]+)/; var ua =

Common JS verification REG Good JS verification ~~~~~~~~~~~~~~~~~~~~~~~~~ Purpose: Verify the format of the IP address input: strIP: Return IP Address: true if verification is successful, otherwise false is returned; */function isIP (strIP) {if

As mentioned in the JavaScript version of Tetris, the project structure and many names are chaotic due to temporary start. In addition, scoring and other functions are not implemented. This time, scoring and speed settings were implemented, and a

The question of matching JS brackets is a question of matching brackets on codewars. Question To determine whether the brackets {}, [], and () in the string match, consider nesting. Example: validBraces("(){}[]") // true validBraces("(}")

Although I have seen some articles about callback in the past, it is a little hard to understand. At that time, there was a concept in my mind. Preface Although I have seen some articles about callback in the past, it is a little hard to understand.

When the browser window is adjusted to a new height or width, the resize event is triggered. This event is triggered on the window. How can we add a resize event to the div element, how can I change the div height or width? A great God uses jquery

Recently, I was looking at situ zhengmei's JavaScript framework design. I saw that the chapter of asynchronous programming introduced the jsdeferred library. I found it interesting. I spent a few days studying the code, here we will share with you.

User-Defined right-click menu. For some ERP systems, there are many function operations, so we usually put several common functions in the User-Defined right-click menu for your convenience. Custom right-click menu User-Defined right-click menu.

Today we will talk about a small knowledge point, a ternary operator. As the name implies, A Trielement operation has three elements. Is the expression roughly composed of condition? Expr1: expr2; A statement adds two expressions. Before the

What are the benefits of automated testing of js code? When writing test scripts, developers can better understand the functions and return values of the Code. They can perform accurate and direct tests and immediately see and adjust the test

Element operations of jQuery and event binding 1. Attributes of operation elements: ① Attr read :( "selector "). attr ("attribute name"); => getAttribute ("attribute name"); ("selector "). attr ("attribute name"); => getAttribute ("attribute name");

Image uploading is a frequently used function in web development. The node community also provides comprehensive support in this regard. Common open-source components include multer and formidable. With these two open-source components, you can

Verify the ID card information in Javascript function validateCard(pId, field){ var arrVerifyCode = [1,0,"x",9,8,7,6,5,4,3,2]; var Wi = [7,9,10,5,8,4,2,1,6,3,7,9,10,5,8,4,2]; var Checker = [1,9,8,7,6,5,4,3,2,1,1];

Codesplitting: Before optimization: index.html introduces a main. js file with a size of more than 2 MB. After optimization: index.html introduces main. js, commons. js, charts. js, AND other. js. To divide main. js equally. Each file is less than

A lot of code is running on the client! The huge code library needs to be managed in an orderly manner, while the Module system Modulesystem provides the ability to split the code library into modules and use more JavaScript More user interfaces

Remove unnecessary spaces at the beginning and end of the string. g is the full text search for all matching functionString. prototype. Trim () {returnthis. repl remove unnecessary spaces at the beginning and end of the string. /G is the full text

Functionobj $ (id) Get object functionval Based on id $ (id) Get object Value functiontrim (str) delete left and right spaces functionltrim (str) delete left space functionrtrim (str) delete the right-side space: functionisEmpty (str); whether the