What does prop in vue mean?

Prop is a property in Vue.js that passes parent component data or methods to child components. It allows child components to access the state of the parent component. Prop is defined in the child component and can use data types such as Boolean, string, number, array, object or function. Required and default values ​​can be set, but modifying the Prop value in the child component will not affect the original value of the parent component. , because Props are all one-way bound. The advantages of Props include increased component reusability, ease of understanding and maintenance, and reduced parent-child component coupling.

Prop in Vue

What is Prop?

Prop is a property in Vue.js that is used to pass data or methods from parent components to child components. It allows child components to access the parent component's state without having to access the parent component's instance directly.

Usage of Prop

Prop is used in child component definitions to specify the parent component data to receive. The syntax is as follows:

<code>props: ['propName']</code>

Type of Prop

Prop can be the following data types:

• Boolean value
• String
• Number
• Array
• Object
• Function

Required and default value of Prop

You can set the Prop as required, that is, the sub-component must provide the Prop. You can also set a default value when defining a Prop in case the Prop is not provided by the parent component.

<code>props: {
  propName: [Boolean, { default: false }]
}</code>

Modification of Prop

Modifying the value of Prop in the child component will not affect the original value in the parent component. This is because Prop values ​​are one-way bound. If you need to modify the value of the parent component, you need to trigger the method in the parent component through the $emit event.

Advantages of Prop

The advantages of using Prop include:

• Improves the reusability of components
• Let Components are easier to understand and maintain
• Reduce the coupling between parent and child components

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