How does the vue component receive the value passed by others?

Vue is a very powerful JavaScript framework that provides an easy-to-understand and use component system that can help us better perform web development.

In Vue, a component can be written as an independent, reusable module. However, when developing actual projects, it is likely that data needs to be transferred between multiple components. In this case, data needs to be transferred between Vue components.

In Vue, data transfer between components can be achieved through props attributes. The props attribute allows parent components to pass data to child components for use in their own templates.

When we need to pass data to a child component, we first need to define a props attribute in the child component, as shown below:

Vue.component('child-component', {
    props: ['msg'],
    template: '<div>{{msg}}</div>',
});

Here, we define a child component child- component, which has a props attribute named msg. At this time, the parent component can pass a field named msg to the child component, as shown below:

<child-component msg="Hello World!"></child-component>

Through this props attribute, the child component can receive the data passed by the parent component and display it in its own template used in.

In the child component, we can output the data passed by the parent component through {{msg}}.

In addition, there is another way to pass data to subcomponents, that is, use the v-bind directive. The v-bind directive can dynamically bind a property to an expression, as shown below:

Vue.component('child-component', {
    props: ['msg'],
    template: '<div v-bind:title="msg">{{msg}}</div>',
});

Here, we define a child component child-component, which has a props attribute named msg. In the template of the subcomponent, we use the v-bind directive to bind the msg attribute to the title attribute, so that the title attribute of the subcomponent can be dynamically changed.

In the parent component, we can bind a data to a property through the v-bind directive, as shown below:

<child-component v-bind:msg="message"></child-component>

With this v-bind directive, we bind the The message field of the data attribute is bound to the msg attribute of the child component.

In short, there are two ways to pass data to subcomponents in Vue, one is to use props attributes to pass, and the other is to use the v-bind directive to pass. No matter which method is used, we can achieve data transfer between components for better web development.

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