the reference answer GPT ᴼ ᴾ ᴱ ᴺ ᴬ ᴵ < br / > in Vue, ref can be used to obtain the DOM element reference not only, also can be used to create the response data. This is because Vue introduced the Composition API in version 2.0, and ref allows you to create a responsive object that can be used in either a template or a component.
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In Vue 3, ref is used to wrap basic type data, converting it into responsive objects such as Number, String, Boolean, and so on. Reactive objects created by ref can have their values accessed in the component via.value, or they can be used directly in the template, where Vue automatically unpackages them. In addition, a ref can be used to get a reference to a DOM element, which can be accessed within a component by attaching a ref attribute to the element and binding it to the corresponding attribute of the component instance.
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To sum up, ref is mainly used in Vue in the following two cases:
- is used to get a reference to a DOM element, accessed in a template or component using a $refs object.
- is used to create reactive data, converting primitive type data into reactive objects for use in components or templates.
