JavaScript

FilterFilter is also a common operation, it is used to Array filter out some of the elements, and then return the remaining elements.and map() Similarly, Array filter() a function is also received. And the map() difference is that the filter()

1, filter is also a common operation function, he is used for some elements of the array, and then return the remaining elements, and map () like, the array of filter () also accepts a function, and map () is different, filter () The function of the

Array and array operationsSecond, circular statements for and whileGetting Started with JavaScript (v) Array manipulation, looping statements

There are many ways that JavaScript creates objects, and you can create individual objects by using the object constructor or the literal of the objects, obviously both of which produce a lot of duplicate code and are not suitable for mass

Weekfunction Formatweek (n) {Let mydate = new Date ();Let Theday=mydate.getday ()Let week=[' Monday ', ' Tuesday ', ' Wednesday ', ' Thursday ', ' Friday ', ' Saturday ', ' Sunday 'Let Year=mydate.getfullyear ();Let Month=mydate.getmonth () +1;Let

var declares a variable that is an entire regionLet declares that the variable is valid only in the local area.123 + A at - the difference between Var and let - - - let allows you to declare a variable, statement, or expression that has a scope that

Offline detection First check that the device is online, HTML5 defines the Navigator.online attribute, and HTML5 also defines two events: online and offline, which are triggered when changes are made to the line and offline status switches.

Simple message boards made with native JS.With the following functions: 1, enter the text message in the input box, 2, the message displayed in the message board, 3, delete the message.HTML and CSS code:1 DOCTYPE HTML>2 HTMLLang= "en">3 Head>4

For value types, you can use TypeOf to judge, but typeof the reference type when the return value is only object/function, do not know exactly which one. The instance will be used at this time. For example, F1 is created by the Foo function, but why

"Simple Factory mode": Same typevarCat =function () { This. hh = ' High cold '} cat.prototype={pin:function() {Console.log (White); } } varDog =function () { This. hh = ' sticky person '} dog.prototype={pin:function()

When it comes to JavaScript inheritance, I believe that as long as the front-end developers have some understanding or application, because this is too basic knowledge. But I do not know whether you have in-depth understanding of the mystery and

What is HTML5 ?, HTML5? HTML5 is the next generation of HTML.What is HTML5? HTML5 will become a new standard for HTML, XHTML, and html dom. The previous version of HTML was born in 1999. Since then, the Web world has undergone great changes. HTML5

Webpack vue Project Development Environment LAN access method, webpackvue Ideas:Set the startup ip address and port of your project. Of course, the port can also be 8080 by default. Steps: 1. view your own ip address in the LAN Command Line

Solve the Problem of dynamic parameter passing through query in vue-router. Recently, when writing a project, you will always find one or another problems. For example, the query in vue-router can pass dynamic parameters, which has gone through some

Solve the problem that the DOM operation on the vue page does not take effect. The dom operation on the vue page takes effect. Symptom: The Element UI is used to render a tree structure. The operation button is displayed when you move the mouse

Vue obtains the method of the current active route, and vue obtains the current route A route object (route information object) indicates the status information of the currently activated route, including the information parsed by the current URL,

Css Adaptive Layout: "The holy tree Flying Wings" and css adaptive holy tree Flying Wings First of all, I don't know who the name is. That is to say, the content in the middle is adaptive to the width of the browser, the content on both sides is

Use vue to create an instance code for probe, slide, and stack components. As follows:   Preface Hi, I think you should be familiar with all the procedures (after all, there are many sisters). The slide sign on the top plays a key role in exploring

Vue. js or js to achieve the sorting of Chinese A-Z, vue. jsjs Chinese a-z According to the A-Z method, you can write in the vue's methods: Methods: {pySort: function (arr, empty) {var $ this = this; if (! String. prototype. localeCompare) return

JavaScript full star navigation bar implementation method, javascript full star Description Share the effects of a full-day navigation bar with few codes, but the results are quite good. Let's take a look at them first. Explanation To achieve this