In Vue3 non-setup syntax sugar, how to use component props gracefully in CSS v-bind?

How to elegantly use component's props in css v-bind in vue3 non-setup syntax sugar?

In vue3 projects, we often use props to pass data to child components. Normally, props can be accessed directly in templates. However, there may be some problems when trying to dynamically bind props values ​​using v-bind in css style. The code example provided in the article is a typical scenario: the developer hopes to set the style of the component through v-bind in

This is because vue's compiler will automatically inject props into the component's context when processing templates, but the content in the style tag will not automatically have the ability to access props. Therefore, it is invalid to use props directly in

The key to solving this problem is to return the props object from the setup function to the context of the component. The modified setup function is as follows:

 setup(props) {
    return {
        Props
    };
}

By directly returning the props object, the style tag can access all properties in the props. The v-bind directive in the modified

 .download-btn {
    width: v-bind('props.width');
    height: v-bind('props.height');
    color: v-bind('props.color');
    background-color: v-bind('props.bgColor');
    font-size: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 15px;
    .showline(1);
}

In this way, the instructions such as v-bind('props.width'), v-bind('props.height') can correctly obtain and bind the values ​​in props to achieve dynamic style settings. It should be noted that all props that need to be used in style must be returned in the setup function in this way.

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