react extension and basic use of hooks
1. setState Two ways to write setState update state (1). setState(stateChange, [callback])------Object-oriented setState 1.stateChange Change object for state(This object can reflect the change of state) 2.callback Is an optional callback function, After the status is updated and the interface UTF-8...
Posted by rckehoe on Fri, 24 Sep 2021 18:25:35 +0530
On JS type conversion
1, Data type JS has six simple data types: undefined, null, boolean, string, number, symbol, and three reference types: function, object, array However, JS only uses one type when declaring, and the current type can only be determined when running. During operation, JS does not strictly restricUTF-8...
Posted by stone.cold.steve.austin on Fri, 24 Sep 2021 20:25:56 +0530
Vue realizes the effect of commodity magnifying glass
1, Preface: In this prosperous era of e-commerce, we can bring goods live or go shopping independently. We further check the details of our cognition and understanding of the goods and find that our goods can be viewed in a larger scale. On a whim, we use the front-end technology Vue framework UTF-8...
Posted by billybathgate on Sat, 25 Sep 2021 08:16:35 +0530
Array method
1. General method of array 1. concat(X，X , 10) Merge arrays. This method will not change the original array (x can be a specific value or an array, and can be passed to any number) var arr = [1, 2, 3] var arr1 = arr.concat(4, 5) console.log(arr);//Original array returned console.log(arr1);//ReUTF-8...
Posted by AndyEarley on Sat, 25 Sep 2021 11:34:32 +0530
js implementation of pot beating Grey Wolf
catalogue thinking 1, Layout 2, Achieve gray wolf up animation 3, Achieve gray wolf down 4, Achieve random hole effect 5, Implement click events and calculate scores 6, Implementation cover 7, Implementation progress bar 8, Implementation restart thinking Wrap each hole in a box, then give the UTF-8...
Posted by yalag on Sun, 26 Sep 2021 00:08:07 +0530
vue router of vue family bucket series
1. Preface The last article said Route redirection of Vue router, route nesting, named route and the use of route alias Next, let's look at other uses 2. Route naming view Sometimes you want to display multiple views at the same time (at the same level). For example, create a layout with two vUTF-8...
Posted by Hamlets666 on Sun, 26 Sep 2021 06:38:11 +0530
JS object inheritance method
Prototype chain inheritance The key to this approach is that the prototype of the subtype is an instance object of the parent type // Parent type function Person(name, age) { this.name = name; this.age = age; this.play = [1, 2, 3]; this.setName = function() {}; } Person.prototype.setAge = functUTF-8...
Posted by mobilephp on Sun, 26 Sep 2021 16:22:27 +0530
Serialize the third part of "explanation of Chrome V8 principles", look at the V8 compilation process and learn lexical analysis
Original source: See the V8 compilation process and learn lexical analysis - Security guest, security information platform Content of this article This is the third part to explain the implementation of lexical analysis (scanner) in V8, which involves several important data structures and some UTF-8...
Posted by martinacevedo on Mon, 27 Sep 2021 04:21:46 +0530
The wechat gold counting plan opens the merchant ticket, and the page jumps after the wechat payment is completed
Today, there is a need to modify the WeChat h5 business page of WeChat uniapp official account, and set up a button to jump home. (I feel that the content I want to write below is more general, which is not only applicable to my uniapp requirements, but also applicable to small programs) Why isUTF-8...
Posted by sdaniels on Mon, 27 Sep 2021 07:23:54 +0530
JS file operation
reference resources HTML5 Advanced Series: file upload and download How to download files with JavaScript vue+axios upload file axios introduction Small tips: pure front-end JS reads and parses local text class files upload Usual thinking Hide the ugly input type="file", bind the click event oUTF-8...
Posted by SergiuGothic on Mon, 27 Sep 2021 11:09:18 +0530