Learn about JavaScript (2)-some concepts to understand

What is Ajax?Ajax is a way to create an interactive Web application. Ajax is asynchronous Javascript and XML abbreviation (asynchronous JavaScript and XML), which is just A small part of JavaScript. Ajax generally refers to a combination of the

JavaScript DOM Programming Art-Read notes

StatementThe code written by JavaScript must be embedded in a html/xhtml document to be executed.Mark-upgoes here ... Better way to put JavaScript code in a separate file ——. js (extension)Mark-upgoes ... Example: test.htmljust a testMark-up Goes

JavaScript unsigned shift operator >>> three greater than sign use method

JavaScript unsigned shift operator >>> three greater than sign use methodThe unsigned shift operator in JavaScript is represented by a three greater than sign.Calculation methodExample 100>>>2The binary of 100 is01100100Move 2 bits to the right

function scope of JavaScript

  Students with experience in C programming should know "block scope": Each piece of code within the curly braces has its own scope and is not visible outside the code snippet that declares them. In JavaScript there is no block-level scope, and

JavaScript in caller and callee

Recently learned JavaScript, encountered caller and callee problems, to go online Baidu a lot. Search the content of Datong small benefits, finishing summed up and share with you.Caller: Returns a reference to the function that called the functions

Summary of JavaScript common operators and operators

Summary of JavaScript common operators and operators Category Operator Arithmetic operators +, –, *,/,% (modulo) String operator + String Connection + = string Join compound

[Leetcode] [JavaScript] Surrounded regions

Surrounded regionsGiven a 2D board containing ‘X‘ ‘O‘ and, capture all regions surrounded by ‘X‘ .A region was captured by flipping all ‘O‘ s into ‘X‘ s-surrounded region.For example,x x x xx o o xx x o xx o x xAfter running your function, the board

Double exclamation mark in JavaScript (!!) Role

Often see such an example:var A;var b =!! AA default is undefined.!a is true,!! A is false, so the value of B is false, not undefined, nor other values, mainly to facilitate subsequent judgments.!! Generally used to cast the subsequent expression to

Based on dropdown. js, two levels of navigation menus with beautiful atmosphere are available: dropdown. js

Based on dropdown. js, two levels of navigation menus with beautiful atmosphere are available: dropdown. js This article describes two levels of navigation menus Based on dropdown. js. Share it with you for your reference. The details are as follows:

JavaScript code that achieves auto-floating effect, JS auto-floating Advertisement

JavaScript code that achieves auto-floating effect, JS auto-floating Advertisement This article describes the advertisement code for JS to achieve the floating elasticity. Share it with you for your reference. The details are as follows: Here we

Jquery. mousewheel implements the screen flip effect on the whole screen. jquery. mousewheel

Jquery. mousewheel implements the screen flip effect on the whole screen. jquery. mousewheel Achieve the full screen flip effect:Js to be loaded The css style is as follows: body{padding:0;margin:0; overflow:hidden

Js obtains event objects and elements

Js obtains event objects and elements There are many methods to obtain the event source and the objects that trigger the event. js can be implemented through event. The following is a good example. If you are interested, refer An Html element has

Js achieves multi-level drop-down menu with rounded corners, and js rounded corner drop-down menu

Js achieves multi-level drop-down menu with rounded corners, and js rounded corner drop-down menu This article describes how js achieves a multi-level drop-down menu with rounded corners. Share it with you for your reference. The details are as

Html uses the anchor to locate code instances and Instances

Html uses the anchor to locate code instances and Instances This topic describes how to use an anchor to locate a location. Using an anchor to locate a location is an inherent function of html. Of course, it is relatively simple and implements basic

Jquery implements webpage virtual keyboard effects and jquery Effects

Jquery implements webpage virtual keyboard effects and jquery Effects Usage: The jquery web page virtual keyboard is designed with the number and letter switching function. File Reference: // Add the new value function addValue (newValue)

Common css naming rules and css naming rules

[Go] common css naming rules and css naming rulesCommon css naming rules Header: header Content: content/container End: footer Navigation: nav Sidebar: sidebar Column: column Overall Layout width of the page peripheral control: wrapper Left right

Js web lottery instance and js Lucky Draw instance

Js web lottery instance and js Lucky Draw instance This article describes how to implement web lottery in JavaScript. Share it with you for your reference. The details are as follows: This Web lottery program is implemented based on javascript code.

Tool methods in jquery $. isFunction, $. isArray (), $. isWindow ()

Tool methods in jquery $. isFunction, $. isArray (), $. isWindow ()   In javascript's judgment on the variable type, we explained in jquery$.type()Implementation principle. Of course, in addition to providing$.typeIn addition to the tool methods,

Comparison between native js and jQuery for simple tab switching effects and jsjquerytab Effects

Comparison between native js and jQuery for simple tab switching effects and jsjquerytab Effects The tab is usually applicable to scenarios where the space is limited, the content is large, and the page aesthetics does not give the user excessive

JQuery code implements development history timeline effects and jquery Development History

JQuery code implements development history timeline effects and jquery Development History This article shares a special effect code based on jQuery's Development History timeline, with the left and right arrows and a digital timeline tab to switch

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