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Course Introduction：Core points D3.js is a JavaScript library that can be used in conjunction with AngularJS to create interactive real-time charts with SVG (scalable vector graphics). This combination allows developers to create rich web applications with dynamic data visualization. AngularJS and D3.js can be set in HTML pages to create chart directives. This includes creating AngularJS controllers and instructions and using the controller to save the data to be drawn in the chart. Then, you can use this directive to draw a line chart using D3.js. The chart can be updated in real time to reflect changes in the underlying data. This can be done by using a collection observer in the instruction to monitor changes in the collection data and then detect

2025-02-21 comment 0  590

Course Introduction：Core points AngularJS, Google's popular JavaScript framework, can be used to build dynamic visual applications that leverage the Google Charts API. Angular's two-way binding feature allows charts to change dynamically based on data and user input. Creating a visual application with AngularJS involves several steps, such as setting up Angular, building an application, and creating a chart. This process requires writing code in HTML and JavaScript, using Angular's MVC design pattern, and integrating the Google Charts API for visualization. The Google Charts API provides various graphs

2025-02-22 comment 0  921

Course Introduction：Core points Node.js' web crawling involves downloading source code from a remote server and extracting data from it. It can be implemented using modules such as cheerio and request. The cheerio module implements a subset of jQuery that can build DOM from HTML strings and parse, but it can be difficult to deal with poorly structured HTML. Combining request and cheerio allows you to build a complete web crawler to extract specific elements of a web page, but handling dynamic content, avoiding bans, and handling websites that require login or use CAPTCHA can be more complex and may require additional tools or strategies. Web page

2025-02-24 comment 0  705

Course Introduction：DOM is a structured object model that the browser parses HTML files into. Through a tree structure, JavaScript can dynamically manipulate page content, structure and style. It corresponds to HTML tags in the form of nodes, such as element nodes and text nodes. JavaScript implements interactive operations through the API provided by DOM, such as: 1. Get elements (such as document.getElementById); 2. Modify content (such as textContent); 3. Add or delete nodes (such as createElement and appendChild); 4. Listen to events (such as clicks and inputs). The dynamic nature of DOM enables web pages to respond to user behavior in real time, and is the core of front-end development.

2025-07-07 comment 0  747

Course Introduction：HTML5 declarations must appear at the beginning of the web page, and are used to inform the browser to parse the page with the HTML5 standard to avoid entering weird mode. 1. It is not an HTML tag but a declaration. It must be located on the first line of the file and there cannot be any content in front of it. 2. It is case-insensitive, and there is no need to close the tag or add attributes; 3. When generating in dynamic language, you must ensure that there is no unnecessary interference in the output; 4. You can confirm whether it is effective by checking the source code, developer tools or online verification tools. Proper use ensures that the page renders consistently across different browsers.

2025-07-05 comment 0  886

Course Elementary  13742

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  82249

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  13130

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  24578

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  27435

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.