JavaScript

The This keyword in javascriptThe keyword this in a JavaScript function does not refer to itself (itself), for example: function foo(num) {Console.log ("foo:"+ num);//Keep track of what many times ' foo ' is called This. count++;} Foo.count

form object Regular Objects 1. Registry Name: &L t;/td> Phone Number: ss[JavaScript Regular Validation Section 25th

1, the core of the singleton mode is to ensure that there is only one instance and provide global access.2. An inert singleton refers to creating an object instance when needed.such as creating a unique div in the page general practicevar Creatediv =

Foreword: Although proficient in jquery, but not very familiar with its prototype JavaScript, recently encountered some difficulties in learning JavaScript, such as bubbling and capturing, many times mentioned, but do not know exactly where to apply.

For an interview with a summary written by yourself, refer to the article: "JavaScript Advanced Programming"1. Selector API*queryselector ()Queryselector () receives a CSS selector, returns the first element that matches the selector, and returns

Before learning about the variable scope of JavaScript, we should make a few clear points:A, the variable scope of JavaScript is based on its unique scope chain.b, JavaScript does not have a block-level scope.c, the variables declared in the

When it comes to object-oriented, we've learned about VB and C #, from abstraction to encapsulation to inheritance and polymorphism, and the object-oriented world is really fun, but the object-oriented in JavaScript is special, because there are no

Original: JavaScript data typeData typeThere are 5 simple data types (also known as basic data types) in javascript: Undefined, Null, Boolean, number, and string. There are 1 more complex data types--object,object essentially consist of a set of

In our front-end, regular expressions are often used to retrieve strings, just as JavaScript provides regexp to support regular expressions, while the main method of RegExp objects is exec ().   Grammar Regexpobject.exec (String)

The main use of settimeout (), recursion and string.substring ();The effect is like having a typist typing.123456789DocumentTen One A Text Auto Output - - the - - - + - + +Automate text output with JavaScript

String to Integer (atoi)Implement atoi to convert a string to an integer.Hint:carefully consider all possible input cases. If you want a challenge, please don't see below and ask yourself what is the possible input cases.Notes:it is intended-problem

Writing this topic is simply to take notes for yourself, or old forget.The first method:function fn1 (x) {this.x = x;        } function fn2 (x, y) {this.tmpobj = fn1;        This.tmpobj (x);        Delete this.tmpobj;    This.y = y; }Second method:

Js apply/call/caller/callee/bind usage and Difference AnalysisI. call MethodCall a method of an object to replace the current object with another object (in fact, it is to change the internal pointer of the object, that is, to change the content

404 Not Found origin, 404notfound Origin404 not found! Sorry, no article is found !!What is 404 Not Found? 404 page is a necessary page for a website. It carries the important responsibilities of user experience and SEO optimization. The 404 page

How does css align floating elements horizontally and css floating elements horizontally? For non-floating elements with a fixed width, we can use margin: 0 auto in CSS to center horizontally. For floating elements with an indefinite width, we also

Angularjs uses commands to call ueditor Baidu EditorUeditor is a Baidu editor in Chinese, while angularjs is an excellent front-end JS framework. Next we will introduce the example of calling ueditor Baidu editor in angularjs. If you are interested,

Jquery simulates the alert pop-up window plug-in and jqueryalert pop-up window Demo address: Http://runjs.cn/detail/miwszbne Sharing instructions: The Nth wheel was created, only for the simplest call. jquery simulates the pop-up window plug-ins of

Simple asynchronous programming promise mode and asynchronous promise Mode Asynchronous programmingJavascript asynchronous programming: popular programming methods in the web2.0 era. We usually use code more or less. The most typical is asynchronous

Javascript prototype and prototype chainAs we all know, JavaScript does not contain the traditional class inheritance model, but uses the prototype model. The code implementation is probably like copying the code function Student (name) {this. name =

Web page re-painting, reflux, and solutions The browser displays the webpage processing flowchart: Procedure: 1. the browser parses the obtained HTML code into a DOM tree. Each tag in the HTML is a node in the DOM tree, and the root node is a