How to use Vue high-order components

This article mainly introduces the use of exploring Vue high-level components. The editor thinks it is quite good, so I will share it with you now and give it as a reference. Let’s follow the editor to take a look, I hope it can help everyone.

High-order components (HOC) are common vocabulary in the React ecosystem. The main way to reuse code in React is to use high-order components. components, and this is also the officially recommended approach. The main way to reuse code in Vue is to use mixins, and the concept of high-order components is rarely mentioned in Vue. This is because in # Implementing high-order components in ##Vue is not as simple as in React. The reason is that the design ideas of React and Vue are different, but they are not It is said that high-order components cannot be used in Vue, but the benefits brought by using high-order components in Vue are not qualitative compared to mixins Variety. This article mainly explains the implementation of Vue high-order components from a technical perspective, and will analyze it from both the perspectives of React and Vue.

Starting from React

At first

React also used mixins to complete code reuse, for example, to avoid components For unnecessary repeated rendering, we can mix PureRenderMixin in the component:

const PureRenderMixin = require('react-addons-pure-render-mixin')
const MyComponent = React.createClass({
 mixins: [PureRenderMixin]
})

Later

React abandoned this method, and then Use shallowCompare:

const shallowCompare = require('react-addons-shallow-compare')
const Button = React.createClass({
 shouldComponentUpdate: function(nextProps, nextState) {
 return shallowCompare(this, nextProps, nextState);
 }
})

This requires you to implement the

shouldComponentUpdate method in the component yourself, but the specific work of this method is shallowCompare will help you complete it, that is, shallow comparison.

Later

React In order to prevent developers from always writing the same code in components, it is recommended to use React.PureComponent. In short, React In a step-by-step separation from mixins, they believe that mixins is not a good model in the React ecosystem (note: it does not say mixins Not good, only for the React ecosystem), the views are as follows:

1.

mixins brings implicit dependencies

2. Between

mixins and mixins, mixins and components can easily lead to naming conflicts

3. Due to

mixins is intrusive, it changes the original component, so modifying mixins is equivalent to modifying the original component. As the demand grows, mixins will become complex, leading to snowballing complexity. .

For details, you can check out this article Mixins Considered Harmful. However,

HOC is not a silver bullet. It naturally brings its own problems. The point is: using ordinary components with render prop can do anything that HOC can do.

This article will not discuss too much about who is good or bad between

mixins and HOC, just like technology itself is not good or bad, only whether it is suitable or not. Isn’t it the same for these two buddies React and Vue?

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