What is the relationship between react and javascript

react is a library encapsulated in JavaScript language. It is a JAVASCRIPT library used to build user interfaces. It can be used to create Web user interaction interfaces; it introduces a new way to process browser DOM. Gone are the days of manually updating the DOM and laboriously recording every state.

The operating environment of this tutorial: windows7 system, javascript1.8.5&&react16 version, Dell G3 computer.

react is a JavaScript library launched by Facebook for building user interfaces. React is mainly used to build UI. Many people think that React is the V (view) in MVC. React has high performance and very simple code logic. More and more people have begun to pay attention to and use it.

Because the design idea of ​​React is extremely unique, it is a revolutionary innovation, has outstanding performance, and the code logic is very simple. Therefore, more and more people are beginning to pay attention to and use it, thinking that it may be the mainstream tool for web development in the future.

React is mainly used to build UI. You can pass various types of parameters in React, such as declaration codes to help you render UI, static HTML DOM elements, dynamic variables, and even interactive application components.

Advantages of using react

1. React is very fast

It does not directly operate on the DOM, but introduces a virtual DOM Concept, placed between JavaScript logic and the actual DOM, with good performance.

reactjs defines a set of dom models in the form of variables. All operations and conversions are directly in the variables. This reduces the need to operate the real dom. The performance is really high. It is essentially different from the mainstream MVC framework. It does not Dealing with dom.

2. Cross-browser compatibility

Virtual DOM helps us solve cross-browser problems. It provides us with a standardized API, which is no problem even in IE8.

3. Everything is component:

The code is more modular, it is easier to reuse the code, and the maintainability is high.

4. One-way data flow

In fact, the core content of reactjs is data binding. The so-called data binding means that as long as some server-side data is bound to the front-end page, developers Just focus on realizing the business

5. Isomorphic, pure javascript

Because the search engine crawler program relies on server-side response rather than JavaScript execution, pre-rendering your application has Helps with search engine optimization.

6. Good compatibility

For example, use RequireJS for loading and packaging, while Browserify and Webpack are suitable for building large applications. They make those difficult tasks less daunting.

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