JavaScript

1. OverviewA regular expression is an object that describes a character pattern.Regular expressions are used to match string patterns and retrieve replacements;2. GrammarThe former is a pattern and the latter is a modifier.var New " XYZ " " I " ); /

Regular Expression Manual:Http://tool.oschina.net/uploads/apidocs/jquery/regexp.htmlRegular expression Test address:http://tool.chinaz.com/regex/Let's give an example: E-mail[Email protected]1.username (example)([a-z0-9_\.-]+)[Email protected]@3.

typeof and Instanceof The string type can be judged by typeof, but when the array, object, regular, null are returned, it is all object, so instanceof can be used to determine the type Note: When the type is string, it will be false if you

CharAt () Gets the character at a particular index in the string;toUpperCase () converts all characters of a string into uppercase letters;IndexOf () returns the position of the first occurrence of a particular string in a stringSUBSTRING () returns

1. Array-related properties and methodsHere are just a list of relevant, specific use, please refer to the URL.Array Object PropertiesConstructor returns a reference to the array function that created this object.Length Sets or returns the number of

This article was initially published in Http://szhshp.orgReprint Please specify Event snapping and bubblingThe first catch is necessarily the parent node, then a layer of layers is captured down, then a layer of layers bubbles upHere is a TD to

What is a closure??A function that has access to a variable within the scope of another function is a closure.See an example:1 functionA () {2 varn = 0;3 functionInc () {4n++; 5 Console.log (n);6 }7 returnInc;8 }9 varc =a ();TenC

Use the sass configuration method in the vue project. 1. Create a new project based on the webpack Template $ Vue init webpack myvue 2. Install the dependency in the current directory $ Cd myvue $ npm install 3. Install the sass dependency

Simple web server function example implemented by nodejs, nodejsweb This article describes the simple web server functions implemented by nodejs. We will share this with you for your reference. The details are as follows: Front-end js Code: $.

Vue2.0 uses loop traversal to load different images, and vue2.0 Loads Demo: Introduce the image. Note the following path: Import con1 from "@/assets/img/con01.png"; import con2 from "@/assets/img/con02.png"; import con3 from

V-for iteration syntax changes (key and index) in Vue2.0, vue2.0v- Today, I found in my code about Vue2.0 that the $ key value cannot be rendered successfully. The problem is as follows: The key value of this object cannot be displayed: Later

Solve the Problem of white screen on the home page after vue build is packaged. 1. Problem Description The local vue project can be viewed on the server, but the local preview is a white screen after npm run build is run. There are a lot of js and

Angularjs uses gulp-uglify to compress and then execute an error, The cause of the problem is that after compression, the variable becomes e, s, t, and so on. The method for dependency injection does not use braces for injection, but is directly

Use v-for in vue to traverse two-dimensional arrays. As follows: {{itemss}} The data is as follows: This. data = [[{type: '', name: 'asset ', start: 'End balances', end: 'End balances '}, {type:'', name: 'liabilities

Vue2.0 computed calculates the cumulative value of the list loop instance, vue2.0computed The instance is as follows: {{ msg }} Foo {{ item }} --> {{ a [index] = item. bb }} index :{{ index }} --> : {a }} {{ cc }} click --> The above

Vue and vue-i18n combined to realize the multi-language switching method of background data, vuevue-i18n Define functions in the XXX. js file: GetUser (context, info) {context. $ http. get (SERVER_URL + '/users', info ). then (function (data) {let

Vue2 global variable setting method Recently, I learned about js global variables in VUE. JS. It is not so much a global variable in VUE as a global variable in modular JS development. 1. dedicated global variable Module It is to organize and manage

Jquery click the Enter key to achieve the login effect and the default focus Method, jquery return key Recently, when logging on to a project, you need to click the "login" button each time to go to the corresponding page and give the user a poor

HTML & CSS,HTML Xml (Tag Name) Extensible Markup Language Html hypertext markup language (text, images, links) <> Compiling pages on the Internet (H5 version: supports multiple tag features)Standard, mark each part of the page to be displayed by

The JavaScript implementation code is switched randomly, and the javascript code is switched Js achieves random number switching. The code is divided into js and html parts. For more information, see Js Code: Arr_wx = new Array ("aaaa", "bbbb",