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Course Introduction：10 jQuery CAPTCHA plug-ins to help you protect your website/blog forms from spam and robots. CAPTCHA is designed to distinguish robots from humans, and even malware, to provide security for your system. If you want to block bots from accessing your website, then CAPTCHA is the best choice. Here are some tutorials: jQuery AJAX PHP CAPTCHA Quickly build a runnable AJAX CAPTCHA. Integrate it with the jQuery Validate plugin to check if the verification code is correct through remote AJAX request. Tutorial Demo QapTcha: Based on jQuery and jQuery

2025-03-03 comment 0  615

Course Introduction：Use jQuery code snippet to store data in a div for later reference. The data is not displayed in the div, but is stored in the element. Note that if the jQuery collection refers to multiple elements, the returned value refers to the first element. Here is how to operate: // Set the value to be stored $("div").data("valuename", "hello"); // Get the stored value var value = $("div").data("valuename");

2025-03-10 comment 0  731

Course Introduction：Say goodbye to jQuery and embrace Vue.js: build a simpler and more efficient web application Want to learn Vue.js from scratch? Join SitePoint Premium now for a complete collection of Vue.js books covering Vue.js basics, project practices, tips and more for just $14.99 per month! Many developers still rely on jQuery when building simple applications. While sometimes you only need to add a small amount of interactivity to your page, using JavaScript frameworks seems too complicated - extra code volume, boilerplate code, build tools and module packers, and more. Introducing jQuery from CDN seems like a breeze to choose. This article is intended to convince you, even if it is right

2025-02-14 comment 0  934

Course Introduction：The JavaScriptJIT compiler and JVM have similar mechanisms in runtime optimization, but the implementation methods vary due to different language characteristics. 1. Both adopt hotspot code recognition strategies. JIT dynamically compiles frequently executed code, and JVM's HotSpot triggers compilation based on the number of method calls; 2. JavaScript uses type speculation and relies on runtime feedback for optimization and adjustment, while Java implements earlier and more radical optimization based on static type and bytecode verification; 3. The JavaScript engine is limited by the browser environment and is more limited in resource use than JVM, and JVM has more mature garbage collection, multi-threading support and complex optimization capabilities. Understanding these similarities and differences will help improve the front and back end

2025-07-18 comment 0  761

Course Introduction：You may have read the previous article to learn how to use jQuery to capture a single keypress. In this example, you can capture multiple key combinations. Array (arrShortCut) is defined as follows: 1. Name (for reference only) 2. Keyboard code 3. Functions executed in the variable iShortCutControlKey If the control key is active state "the control key is the "off state", if the verification key key presses "No control" as "active state", then find out whether there is a preset for the key in the array, if the function calls "execShortCut"...execute the function; // To test CTRL Z = alert(2) v

2025-03-04 comment 0  293

Course Elementary  13787

Course Introduction：Scala Tutorial Scala is a multi-paradigm programming language, designed to integrate various features of object-oriented programming and functional programming.

Course Elementary  82307

Course Introduction："CSS Online Manual" is the official CSS online reference manual. This CSS online development manual contains various CSS properties, definitions, usage methods, example operations, etc. It is an indispensable online query manual for WEB programming learners and developers! CSS: Cascading Style Sheets (English full name: Cascading Style Sheets) is an application used to express HTML (Standard Universal Markup Language).

Course Elementary  13154

Course Introduction：SVG is a markup language for vector graphics in HTML5. It maintains powerful drawing capabilities and at the same time has a very high-end interface to operate graphics by directly operating Dom nodes. This "SVG Tutorial" is intended to allow students to master the SVG language and some of its corresponding APIs, combined with the knowledge of 2D drawing, so that students can render and control complex graphics on the page.

Course Elementary  24601

Course Introduction：In the "AngularJS Chinese Reference Manual", AngularJS extends HTML with new attributes and expressions. AngularJS can build a single page application (SPAs: Single Page Applications). AngularJS is very easy to learn.

Course Elementary  27461

Course Introduction：Go is a new language, a concurrent, garbage-collected, fast-compiled language. It can compile a large Go program in a few seconds on a single computer. Go provides a model for software construction that makes dependency analysis easier and avoids most C-style include files and library headers. Go is a statically typed language, and its type system has no hierarchy. Therefore users do not need to spend time defining relationships between types, which feels more lightweight than typical object-oriented languages. Go is a completely garbage-collected language and provides basic support for concurrent execution and communication. By its design, Go is intended to provide a method for constructing system software on multi-core machines.