JavaScript

The code is as follows Copy Code /** Base64 Code*/var base64encodechars = "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz0123456789+/";var base64decodechars = new Array (-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,

In recent projects, a variety of information is often required to format validation, of course, the most common is through the regular expression of validation, In your previous blog, you found a way to do the following: Mailbox format is not

Example The code is as follows Copy Code /*** Implementation subclass inherits the parent class, but does not produce redundant properties and methods* @returns {Function}*/Define (function () {return function (subtype,

In JavaScript, creating an array can use the array constructor, or use the array direct amount [], which is the preferred method. The array object inherits from the Object.prototype, and the array performs the typeof operator to return object

In JavaScript, instantiating an object uses the New keyword. People often ask me when to use the New keyword for a function. Before you answer this question, you need to understand the nature of new and what the new action does when invoking the

Anonymous functions are functions that have no names, and closures are functions that can access variables in a function's scope. A anonymous functions The code is as follows Copy Code normal functionfunction box ()

Many of the frameworks have a parent-child relationship that is cumbersome to operate, and many students often have this sad code: The code is as follows Copy Code Window.parent.document.getElementById ("main").

1, get the current JS file path in jquery In jquery to get the current JS file path is relatively simple, only need the following line of code to be done. var __file__ = $ ("script"). Last (). attr ("src"); Note that we typically place this line

Error prompted unterminated string literal, mainly because the output in JS contains N. The solution is to first take the data in the following way to remove N, and then pass the value of JS. The code is as follows Copy Code

Format is day/month/year The code is as follows Copy Code Date format[' Date_au ', function (v) {if (vanadium.validators_types[' empty '].test (v)) return true;var regex =/^ (d{2})/(D{2})/(d{4}) $/;if (!regex.test (v))

Similarly, we can imagine that the 1/3 result should be 0.3333333333333333.To get the results we want, we need to correct this value. In JS, the parsefloat function can be used to convert strings into floating-point numbers. We can use the parseint

Number.tofixed (x) is the x bit after the specified number is intercepted, and number.toprecision (x) intercepts the entire number to the specified (x) length. Note that one calculates the length of the decimal point, and one is the length of the

A value that takes a parameter from a URL without having to loop purely with a regular implementation. The core technique for replacing loops is that the replace () method of a string can be used as a second parameter and replaced by a user-defined

Web page Effects subString () method and slice () method The slice () method extracts a part of the string and returns the extracted part with a new string.GrammarStringobject.slice (Start,end)Parameter descriptionThe starting subscript of the

A few days ago, the project has a function and a treasure shopping to pay the password of the input box a bit similar, wrote this blog, right when the summary notes. ?? Kidnap policeman was stationed soy play with benzene by washing

The code is as follows Copy Code document.getElementById (' intro '). Style.color = ' #FF0000 '; In order to understand the functionality of this API, it is easy to understand that by looking at it from one step to the next:

Tip: you can modify some code before running Customer service of a website that is fixed on the right of the webpage与之间-->与之间-->Our business hoursAM-AMQq consultationMsn consultationWangwang onlineTel: 010-88888888 Tip: you can modify some code

SetTimeout ()SetTimeout () is the method of window, but we all skip the top-level object name of window. This is used to set a time. When the time is reached, a specified method will be executed. Let's take a look at the next simple example. This is

Calendar-Converter is a simple plug-in that may only be used by Chinese applications or websites. The plug-in function is to convert the date and time between the Gregorian Calendar and the lunar Calendar.ExampleFirst introduce the plug-in fileThen

Number () is used to convert numbers, String () is used to convert strings, and Boolean () is used to convert Boolean values.JavaScript data typeThere are five data types that can hold values in JavaScript:· String· Number· Boolean· Object·