JavaScript

The BOM is an abbreviation for the browser object model, the browser-based, which provides an API that is independent of the Web content and the interaction between browser forms. The API consists of several objects, because the browser is the host

Single-Case mode:Simple single Case- var div = function (name) { this.instance =null; this.name = name; }; Div.prototype.getname= function () { alert (this.name); } Div.getsingle = function () { if

Closure related interview questions:1.var a=0,b=0; function A (a) {a=function(b) {Console.log (a+b++);}; Console.log (a);} A (1); A (12);A (1) normal execution, Console.log (a);//1 when a function is called, a global a function is created,

1.math.random (); The result is a random number between 0-1 (including 0, excluding 1)2.math.floor (num); The parameter num is a numeric value and the function result is the integer portion of Num.3.math.round (num); The parameter num is a numeric

Original link: 1190000006752076A variable can hold two types of values, the values of the base type (primitive values) and the value of the reference type (reference values).ES6 introduces a new primitive data type, Symbol, that represents a unique

Abstract Factory mode, which is a kind of creation pattern, is actually a method of implementing subclass inheriting parent class, in this method, by passing subclasses and inheriting the name of the parent class, and adding a judgment to the

Add forward on the page, back (return to the previous level) feature:Way one: Using functions Way two: Forward Back Easy to doubt the place:Each page can be set back forward button, only this page jumps to other pages. The Forward button on

6 ways that JavaScript inherits1，原型链继承2，借用构造函数继承3，组合继承(原型+借用构造)4，原型式继承5，寄生式继承6，寄生组合式继承1. prototype chain inheritance.Features: Inherits the template of the parent class and inherits the prototype object of the parent class.Disadvantage: You can only

Constructors Create objectsFirst we use the constructor to create an object:function Person(){}var person = new Person();person.name = ‘tom‘;console.log(person.name) //tomIn this example, person is a constructor, and we create an instance object

"_proto_ and Prototype"1.prototype (prototype function): The function has a prototype.prototype is an object that points to the reference address of the current constructor.2._proto_ (object's prototype object): All objects have _proto_ properties.

The underlying variables of JavaScript, the detailed description of the operators, and the basic branch loop nesting are already inJS basic variables and the operators in JSLooping branch Nesting in JSAs I said, what we are talking about today is

Css reconstruction journey (1): css reconstruction journeyCss refactoring tour> preface: my freshman year this year is about to become a sophomore year. The year from the summer of my senior high school graduation to the university will soon pass,

JavaScript Form Verification implementation code and javascript form code JavaScript can be used to verify the input data in the HTML form before the data is sent to the server. JavaScript Form Verification JavaScript can be used to verify the

Basic Definitions and usage of JS callback function instance analysis, and js callback function instance analysis This article describes the basic definitions and usage of JS callback functions. We will share this with you for your reference. The

Example of bootstrap raster system code sharing, bootstrap raster The examples in this article share the code of the bootstrap raster system for your reference. The details are as follows: Grid System 1 2 3 4 5 6 7

Float of CSS editing elements and float of CSS editing Elements 1. element floating: 1) use float: left; To set the element floating mode, the attribute value can be left or right; 2) When the element is set to left floating, the element will float

AngularJS + bootstrap implements the dynamic product selection function example, angularjsbootstrap This article describes how AngularJS + bootstrap enables dynamic product selection. We will share this with you for your reference. The details are

Examples of bootstrap response tables and bootstrap instances Bootstrap's responsive CSS can adapt to desktops, tablets, and mobile phones. Now, we will give an example of bootstrap's responsive CSS: As shown in, this table only displays the code,

The src attribute of img in Vue is bound to the static folder instance, vuesrc Many people encounter this problem during vue development: the src attribute of img is bound to the url variable, but the image loading fails. In most cases, developers

Learning the html (12) CSS layout model from scratch-on, css layoutI. css layout model After understanding the basic concepts and types of the CSS box model, we can thoroughly explore the basic model of web page layout. Like the box model, the