Analyze what vue's rendering is

Vue.js front-end framework is a very popular and easy-to-use framework in front-end development. Its rendering mechanism is one of the core mechanisms of Vue.js. Talking about Vue.js rendering is also a quite profound part. Its basic principles and underlying mechanisms are worthy of our analysis and exploration one by one.

How does the rendering mechanism of Vue.js work? During the actual operation of Vue.js, it first converts the HTML code into a virtual DOM. By operating on the virtual DOM, the algorithm realizes efficient data changes and partial page re-rendering, so as to achieve the purpose of not refreshing the entire web page.

The concept of virtual DOM, or the virtual DOM mechanism in the Internet front-end, should actually be said to be an abstraction of the real DOM and a mapping of the real DOM. DOM (Document Object Model) is a way to describe documents in JS. It describes HTML, XML and other documents in a tree structure, so that we can use scripting language to operate these contents. Vue.js uses virtual DOM to solve the performance problem of browser DOM operations, which greatly improves performance when we directly operate the DOM structure.

When the Vue.js rendering mechanism is running, it actually dynamically binds the data model to the view layer and dynamically renders the model data to the view layer. It uses two-way binding technology, that is, when When the model data changes, the view layer also changes. Once the view layer changes, the model data also changes. This mechanism allows developers to only pay attention to changes in data without having to think too much about changes in views, thus greatly improving development efficiency and ease of use.

Different from other MVVM frameworks, Vue.js adopts a strategy that combines data hijacking and observer patterns when implementing data binding. So what is so-called data hijacking? To put it simply, the Object.defineProperty() method is used to intercept the reading and setting of object properties, thereby tracking data changes. The observer pattern, as the name suggests, notifies the observer to perform response operations when the observed changes. In Vue.js, data changes will notify the corresponding observer, and the data area corresponding to the observer will be re-rendered, thus realizing data-driven automated rendering.

When implementing the rendering mechanism in Vue.js, its underlying principles are also very rigorous, efficient and elegant. The rendering mechanism can perfectly combine data and views. When the data changes, partial refresh can be performed gracefully without affecting other content, achieving better user interaction and experience.

In short, the Vue.js rendering mechanism is one of the core mechanisms of Vue.js. It is an efficient virtual DOM mechanism that can perfectly combine data and views, which greatly improves the actual development process. Improved development efficiency and reduced development difficulty. Through an understanding and in-depth mastery of the Vue.js rendering mechanism, developers can greatly improve their mastery of Vue.js and prepare for better applications of Vue.js.

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