How to use event modifiers and key modifiers in Vue documentation

Vue is a front-end framework that is lightweight, efficient, and easy to use. Among them, event modifiers and key modifiers are two widely used functions in the Vue framework.

1. Event modifier

1. .stop

This modifier is often used to prevent events from bubbling. When an element is clicked, if multiple parent elements are bound to the same event, the event will automatically bubble up to the next level. Using the .stop modifier can prevent events from bubbling up, triggering only events for the current element and no longer bubbling upwards.

2. .prevent

This modifier is used to prevent the default event. For example, if a link will jump to another page when clicked, you can use the .prevent modifier to prevent this default event from being triggered.

3. .capture

This modifier is used to capture events. That is, when an event is passed from a parent element to a child element, the event of the parent element is executed first, and then the event of the child element is executed. Use the .capture modifier to change the order of execution. Events of child elements are executed first, and then events of the parent element are executed.

4. .self

This modifier is used to limit the event to triggering only within its own element. For example, a list item contains a button. When the button is clicked, using the .self modifier can prevent the list item's event from also being triggered.

5. .once

This modifier is used to limit the event to triggering only once. For example, when the user clicks a button, the corresponding event handler is executed only once.

2. Key modifier

1. .enter

This modifier is used to monitor the press event of the Enter key. When the user presses the Enter key in the input box, the corresponding event handler can be triggered.

2. .tab

This modifier is used to monitor the press event of the Tab key. When the user presses the Tab key to switch focus, the corresponding event handler can be triggered.

3. .delete and .backspace

These two modifiers are used to monitor the press events of the delete key and the backspace key. When the user presses the delete key or backspace key in the input box, the corresponding event handler can be triggered.

4. .esc

This modifier is used to monitor the press event of the esc key. When the user presses the esc key, the corresponding event handler can be triggered. For example, when the user presses the esc key in the pop-up modal box, the modal box can be closed.

5. .space

This modifier is used to listen for the space bar press event. When the user presses the space bar in the input box, the corresponding event handler can be triggered.

To sum up, event modifiers and key modifiers are very useful functions in the Vue framework, which can help us handle user interactions more flexibly. At the same time, in actual applications, different modifiers can be selected according to specific scenarios to achieve the desired effect.

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