JavaScript

The toString () method in javascript, mainly used for Array, Boole The toString () method in javascript is mainly used for objects such as Array, Boolean, Date, Error, Function, and Number. Below are some of the parsing and simple application of

JavaScript manages scopes through functions. Variables declared within the function are only the concept of global objects available within the function. JavaScript manages scopes through functions. Variables declared within the function are only

Function expressions are still very common in practical applications. In web development, a common pattern is based on a certain feature. Function expressions are still very common in practical applications. In web development, a common pattern is

Removes spaces between the left and right sides of a string. In most programming languages, such as PHP and vbscript Removes spaces between the left and right sides of a string. In most programming languages, such as PHP and vbscript, trim, ltrim,

Sometimes, for the sake of concise design, when the user's mouse is not outdated, we do not need to show the operation prompt to the user. Until the user clicks Sometimes, for the sake of concise design, when the user's mouse is not outdated, we

When using JSON, some special characters make us unable to wait for the expected results. The following filtering method uses When using JSON, some special characters make us unable to wait for the expected results. The following filtering method

Sometimes we need to verify the parent form in iframe, which is actually very simple. Sometimes we need to verify the parent form in iframe, which is actually very simple. In iframe, we can use the parent keyword to call the javascript function of

Dynamic addition and deletion of elements are required in many places. For example, when a large amount of data is required to be collected

JavaScript provides two string truncation Methods: slice () and substr. JavaScript provides two methods to intercept strings: slice () and substring (). Slice and substring can both accept one or two parameters. The first parameter indicates the

The syntax of the replace function is: stringObj. replace (rgExp, re The syntax of the replace function is stringObj. replace (rgExp, replaceText) Where stringObj is a string, reExp can be a regular expression object (RegExp) or a string (string),

The new operator can be used in Javascript to create an object. How does the system use ne? In Javascript, the new operator can be used to create an object. How does the system use the new operator to create an object? Let's take a look at the

We need to remind users that there are new messages, which can be implemented using the following method. The result is that the webpage window is Sometimes we need to remind users that there are new messages, which can be implemented using the

In addition to basic display and hiding, the core of an animation is to dynamically change the position of an element. Same as setTimeout Basic display and hide: function hide(el){　　el.style.display = "none";}function show(){　　el.style.display = "

In some cases, you do not need to right-click the source code of this page, for example, you do not want to view the source code of this page, or copy In some cases, you do not need to right-click the page, for example, you do not want to view the

During ajax development, strings in json format are often returned to the front-end for front-end parsing. JSON is a lightweight data exchange format for ease of operation. Easy to read and write. It is also easy to parse and generate machines.

Rotate the image 360 degrees for one week. Compatible with all browsers. IE: matirx filter webk Rotate the image 360 degrees for one week. Compatible with all browsers. IE: matirx filter webkit: webkitTransform Opera: OTransform firefox: transform.

Sometimes we need to display images in the database in batches, and save the images in the database as the path. However, if Sometimes we need to display images in the database in batches, and save the images in the database as the path. However, if

I am exhausted by its strange syntax when reading many excellent JavaScript source code, so I am often exhausted by its strange syntax when reading many excellent JavaScript source code, so it is necessary to reinforce the basic knowledge of

JavaScript is not object-oriented, so it does not support encapsulation. However, in languages that do not support encapsulation You can see this method in some Javascript libraries: Function () {// code of all databases }(); One purpose of this

Use JavaScript to demonstrate the Singleton design mode. Singleto Basic Structure of Singleton mode: MyNamespace.Singleton = function() {return {};}(); For example: MyNamespace.Singleton = (function() {return { // Public