What is the difference between props and state in react?

The difference between props and state in react: 1. Props are mainly used to transfer parameters between components and obtain the attribute values ​​​​of components. The attribute values ​​​​of external components cannot be directly modified, and they are read-only; 2. State is mainly used for component update control. If you want to re-render or update a component, you only need to modify the state.

The difference between props and state in react:

<strong>props</strong>

is mainly used to pass parameters between components and obtain component attribute values. Data flows between components in one direction, from parent component to child component.

The property value of the external/parent component cannot be modified directly, it is read-only.

<strong>state</strong>

is mainly used for component update control. If you want to re-render or update the component, you only need to modify the state, and then according to the specific Modified state,

re-renders the user interface (without operating the DOM object);

The data in this component is the data of a relatively closed unit/structure

For example

Created the LikeButton component, getInitialState method is used to define the initial state, which is an object, this object can be read through the this.state property. When the user clicks on the component, causing the state to change, the this.setState method modifies the state value. After each modification, the this.render method is automatically called to render the component again

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