In recent years, visualization has become more and more popular. Many newspapers, magazines, portals, news, and media have made extensive use of visualization technology, making complex data and text very easy to understand. There is a proverb "A picture is worth a thousand dollars." A Thousand Words” is indeed worthy of its name. Various data visualization tools have also developed rapidly, and D3 is one of the best.
#What is D3
#The full name of D3 is (Data-Driven Documents). As the name suggests, you can know that it is a data-driven document. document. The name sounds a bit abstract, but to put it simply, it is actually a JavaScript function library. It is mainly used for data visualization. If you don’t know what JavaScript is, please learn JavaScript first.
The suffix of JavaScript files is usually .js, so D3 is often called D3.js. D3 provides a variety of simple and easy-to-use functions, which greatly simplifies the difficulty of operating data in JavaScript. Since it is essentially JavaScript, all functions can be implemented using JavaScript, but it can greatly reduce your workload, especially in data visualization. D3 has reduced the complex steps of generating visualizations to a few simple functions. , you only need to enter a few simple data to convert it into a variety of gorgeous graphics. Friends who have basic knowledge of JavaScript will easily understand it.
The best place to learn D3 is: http://d3js.org/, of course it is all in English.
D3 is a JavaScript function library and does not require what is commonly called "installation". It only has one file and can be referenced in HTML. There are two methods:
(1) Download the D3.js file: d3.zip
After decompression, just include the relevant js files in the HTML file.
(2) You can also directly include network links. This method is simpler:
But the network connection must be kept valid when using it, and it cannot be used when the network is disconnected.
The above is the detailed content of What is d3js. For more information, please follow other related articles on the PHP Chinese website!

The future trends of Python and JavaScript include: 1. Python will consolidate its position in the fields of scientific computing and AI, 2. JavaScript will promote the development of web technology, 3. Cross-platform development will become a hot topic, and 4. Performance optimization will be the focus. Both will continue to expand application scenarios in their respective fields and make more breakthroughs in performance.

Both Python and JavaScript's choices in development environments are important. 1) Python's development environment includes PyCharm, JupyterNotebook and Anaconda, which are suitable for data science and rapid prototyping. 2) The development environment of JavaScript includes Node.js, VSCode and Webpack, which are suitable for front-end and back-end development. Choosing the right tools according to project needs can improve development efficiency and project success rate.

Yes, the engine core of JavaScript is written in C. 1) The C language provides efficient performance and underlying control, which is suitable for the development of JavaScript engine. 2) Taking the V8 engine as an example, its core is written in C, combining the efficiency and object-oriented characteristics of C. 3) The working principle of the JavaScript engine includes parsing, compiling and execution, and the C language plays a key role in these processes.

JavaScript is at the heart of modern websites because it enhances the interactivity and dynamicity of web pages. 1) It allows to change content without refreshing the page, 2) manipulate web pages through DOMAPI, 3) support complex interactive effects such as animation and drag-and-drop, 4) optimize performance and best practices to improve user experience.

C and JavaScript achieve interoperability through WebAssembly. 1) C code is compiled into WebAssembly module and introduced into JavaScript environment to enhance computing power. 2) In game development, C handles physics engines and graphics rendering, and JavaScript is responsible for game logic and user interface.

JavaScript is widely used in websites, mobile applications, desktop applications and server-side programming. 1) In website development, JavaScript operates DOM together with HTML and CSS to achieve dynamic effects and supports frameworks such as jQuery and React. 2) Through ReactNative and Ionic, JavaScript is used to develop cross-platform mobile applications. 3) The Electron framework enables JavaScript to build desktop applications. 4) Node.js allows JavaScript to run on the server side and supports high concurrent requests.

Python is more suitable for data science and automation, while JavaScript is more suitable for front-end and full-stack development. 1. Python performs well in data science and machine learning, using libraries such as NumPy and Pandas for data processing and modeling. 2. Python is concise and efficient in automation and scripting. 3. JavaScript is indispensable in front-end development and is used to build dynamic web pages and single-page applications. 4. JavaScript plays a role in back-end development through Node.js and supports full-stack development.

C and C play a vital role in the JavaScript engine, mainly used to implement interpreters and JIT compilers. 1) C is used to parse JavaScript source code and generate an abstract syntax tree. 2) C is responsible for generating and executing bytecode. 3) C implements the JIT compiler, optimizes and compiles hot-spot code at runtime, and significantly improves the execution efficiency of JavaScript.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

SublimeText3 English version
Recommended: Win version, supports code prompts!

SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

Dreamweaver Mac version
Visual web development tools

Notepad++7.3.1
Easy-to-use and free code editor

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool
