JavaScript

There are 6 types of JavaScript data: numeric data type (number); strings (string); Boolean data (Boolean); Objects (object); Null (NULL); Undefined (Undefined). (a), numbervar a = 12;alert (a);The value of eject a

Source: First-line Code Farm Blog Welcome to share the original to Bole headlinesWork these years, JS study is not very good, just weekend some leisure time, simply buy this "JS authoritative guide", the famous rhino book, Good to JS in-depth look.

This article summarizes the appendices to the book. Appendix A: Dross A.1 Global Variables Global variables are the worst of all the bad features of JavaScript. A global variable is a variable that is visible in all scopes. If some global

Sometimes when we are writing JS, we need to trigger events without returning values, so we might need to write this.href= "#" contains a location information. The default anchor is #top, which is the top of the page, which causes the browser to

A regular expression is a description of the structure of a string , which simply means the character arrangement of a string. It is a master in string matching and processing. The regular notation1. abbreviation :/pattern/[attributes]var reg

Today we don't talk about technical issues, let's talk about how to manage your Javascript code in front-end development. First of all, let's start by saying which management methods are generally available. I believe seajs , Requirejs for front-end

The generic JavaScript framework is implemented by injecting its own properties into the Global object window. For example, jquery adds a "$" object to the window, and underscore adds an "_" object to the Window object. What if these global

1) Control scopeThe query for the symbol of the variable always follows the scope chain, starts the query from the local scope, stops if it is found, or continues querying the outer scope .... Until the global scope is reached.So: Access time for

1. What is DOM?The DOM (Document Object model) is an API (Application programming Interface) for HTML and XML documents. The DOM depicts a hierarchical tree of nodes that allows developers to add, remove, and modify portions of a page.2. Node

A variety of JavaScript definition classes can be found online:1.ECMAScript defining a Class or objectThree ways to define classes (class) in 2.JavascriptI want to sort out a "concise" class definition template that implements the modularity of the

For constructors, which is an instance of a function object, you can define your own static membersInstantiate the object first, then execute the internal code in the functionStatic Members:var abc = function () {}; is both an instance and a

Key Word Delete.1. Delete global object.x = 42;//Creates the property X on the global objectvary = 43;//creates the property Y on the global object, and marks it as non-configurableMyObj ={h:4, K:5};//X is a property of the global object and can be

Radio checked in jquery This article mainly introduces the solution to the radio checked problem in jquery. I would like to thank two enthusiastic netizens for their help, record it, and share it with my friends.   Today it was so cool that I

How to use JavaScript to obtain the selected text in a text box This article mainly introduces how to obtain the selected text in the text box by using JavaScript. examples show how to use javascript to obtain the selected text in the text box by

Summary of common jQuery Data Processing Methods This article mainly introduces common jQuery data processing methods. Examples summarize common jQuery data processing methods such as trim, param, isArray, isFunction, and each, which has some

Example of the add-to-zero operation before JavaScript and javascript instance The example in this article describes how to perform the zero-padding operation before JavaScript. Share it with you for your reference. The details are as follows:

HasOwnProperty () method User Guide in javascript, hasownproperty Overview The hasOwnProperty () method is used to determine whether an object contains the specified attributes. SyntaxObj. hasOwnProperty (prop) Parameters • Prop • Name of the

Javascript controls the text box to only enter numbers and decimal places. js text box This article describes how to enter only numbers and decimal places in the Javascript control text box. Share it with you for your reference. The specific

NodeJS code is suitable for implementing calculation and social security This article uses a specific example of nodejs to compare and analyze the current situation of our social security cooperation is not suitable, mainly for a small application

How JS controls the dynamic generation of any row/column number table on a webpage This article mainly introduces how javascript controls the dynamic generation of any row and column number tables on a webpage. The example shows how to control dom