v-show function in Vue3: a more efficient way to show and hide components

The v-show function in Vue3: a more efficient way to show and hide components

Vue, as a modern front-end framework, has been widely used in various web development. With the official release of Vue3, its performance and user experience have been greatly improved.

One of the important changes is the change in the implementation of the v-show instruction. The traditional v-show implementation will render the component and just set its display attribute to none to display and hide the component. The disadvantage of this approach is that the component is generated on every render and then hidden.

In Vue3, the implementation of the v-show directive has changed. It layers the application's DOM and then applies changes to component state to specific layers. The advantage of this is that you don't need to render the component every time, but only need to update the specific layer of the DOM tree according to the change in the component state. This greatly improves the performance of the application.

For example, we have a component that needs to be shown and hidden under certain circumstances. The traditional v-show implementation generates the component in all cases and simply sets its display property to none. In Vue3, if the initial state of a component is hidden, the component will not be generated during the first rendering. Only when it needs to be displayed, this component will be generated and added to the corresponding layer in the DOM tree.

The benefits of doing this are obvious. When the component needs to be displayed, it will actually be generated and added to the DOM tree, thereby reducing the number of DOM elements. This not only improves the performance of the application, but also reduces the memory usage in the browser and improves the stability of the application.

In addition to the v-show instruction, in Vue3, there are other component status change instructions, such as v-if, v-for, etc., which all use the same layered processing method, thus improving the application efficiency. Performance and stability.

In short, in Vue3, the new layered processing method can be used to display and hide components more efficiently and stably. This will help improve the performance of the application, reduce memory usage, and also improve the stability of the application, making the user experience of the application smoother and more pleasant.

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