JavaScript

Why is JavaScript a single thread?One of the main features of the JavaScript language is single-threaded, meaning that only one thing can be done at the same time. So why can't javascript have multiple threads? This can improve the efficiency AH.The

Definition of ClassWay OnevarBook =function(ID, name, price) {//private property, external cannot be accessed directly varnum = 1; //Private Methods, functionCheckid () {}; This. GetName =function(){}; This. GetPrice =function(){}; This.

One: Understanding the values of the base type and reference type　　JavaScript variables have two different data type values: The base data type and the reference data type. The base data types are undefined, null, Boolean, number, string. Reference

JS Dom Object Onefirst, what is the HTML DOM HTML Document Object Model HTML DOM defines a standard way to access and manipulate HTML documents HTML DOM renders an HTML document as a tree structure with elements, attributes, and

Learning Essentials:Date ObjectConvert a Date object to a stringConverts a date and time in a Date object to a stringDate in Date ObjectTime in a Date objectSet a date in a Date objectSet the time in a Date objectMilliseconds-related methodsOne,

In ES5 we often use the indexof () method to determine whether a string contains another string.Returns the first index value to match, if one exists. If not, returns-1. So, judging whether a string contains another string only needs to be judged if

Options tabIdeas1, buttons and display of the page to correspond: Traverse, remember the index of the current button, so that it becomes the index of the display page2. Only the corresponding page appears: all the pages are hidden, only the desired

Previous wordsThis article describes the event loops in JavaScript in detail Event-loopThreadJavaScript is a single-threaded language, meaning that you can only do one thing at a time. While this single-threaded feature is relevant to its purpose,

1 DOCTYPE HTML>2 HTMLLang= "en">3 Scriptsrc= "Http://code.jquery.com/jquery-1.7.2.min.js">Script>4 Head>5 MetaCharSet= "UTF-8">6 title>Boss Patriotictitle>7 style>8 Body{background:#ececec;margin:0;}9 #test{width:100%;Height:40px;background:#

DescriptionThe previous two blogs introduce the variable types, identifiers, and so on in the basics of JS. This blog mainly talks about expressions and operators.Original expressionThe original expression is the smallest in the expression, cannot

Today, I spent a lot of time reviewing scopes, precompilation, and so on.Looked very Doboven, turned over once read the book (as if many books did not say pre-compilation)found that they have learned very clearly, in fact, there are some mistaken

The relationship between prototype and _ proto _ in Javascript is described in detail. prototype _ proto _ Preface When I learned the prototype, I felt my head was too big )/~~ In particular, prototype and _ proto _ are too stupid to find out more

Solves the problem of Bidirectional binding between the Vue2.x parent component and the child component, and binds the vue2.x component Recently, I have been studying how to write a Vue2.x-based UI component for myself to Improve the efficiency by a

In the vue project, after the release, the background image reports an error, the path is incorrect, and the vue background image Solution: In utils. js Add publicPath :'../../', When introducing an image or background image, use the

V-for Data Group instance in Vue and vuev-for group instance With Vue. js, you can easily bind and update data. Sometimes, you need to group A one-dimensional array to facilitate display, and you can use v-for in a loop. What about grouping? The

Differences between defining functions in JavaScript using var foo = function () {} and function foo (), varfoo One day, when I wrote the code, the county road suddenly encountered this problem. Hoist behavior of JavaScript Functions and variable

The vue-prop parent component transmits values to child components, and the vue-prop component transmits values. Vue-prop is used when the parent component transmits data to the child component. For example, the sub-component is Child. vue

The Vuex solution is based on a solution that cannot observe the value change. When the main routing view is crossed, the Vuex status value is always stored in the memory, so when the component view is re-loaded, the component may not be able to

Use vue and element-ui to set the table content paging instance, vueelement-ui Html code Because I wrote it in the template, that is, I created a new group and pasted the code. In the code, small indicates whether to use a small paging

Vue allows image cropping to zoom in, zoom out, and rotate at the same time. This article describes how to resize, zoom out, and rotate a cropped image by using vue. The details are as follows: Effect: Crop images in a specified area Rotating