Common event modifiers in vue

Common event modifiers in Vue are: .stop/.prevent: prevent the default operation. .capture: Capture the event and handle it before bubbling. .self: Fires the handler only on the event target. .once: Remove the handler after triggering once. .passive: Improves performance and does not block default operations. .enter: The handler is only triggered when the enter key is pressed.

Common event modifiers in Vue

Event modifiers are used in Vue on event handlers Special suffixes that add extra functionality. By using modifiers, you can modify the behavior of an event handler, such as preventing the default action, preventing the event from bubbling, or triggering the event only under certain conditions.

Common event modifiers include:

• .stop: Prevents default actions such as form submission or link navigation.
• .prevent: Same as .stop, but compatible with all browsers.
• .capture: Capture the event before it bubbles up.
• .self: Fire event handlers only on the event target, not its parent element.
• .once: Fire the event handler only once and then remove it from the element.
• .passive: Indicates that the event handler should not block the default action when triggered, thus improving the performance of browser operations such as page scrolling.
• .enter: The event handler is only triggered when the enter key is pressed, usually used for input fields.

Example:

<button v-on:click.prevent="doSomething">点我</button>

In this example, the .prevent modifier is used to prevent the default browser form submission action.

Usage Guide:

When using event modifiers, you should pay attention to the following points:

• The modifier must follow the event name , there should be no spaces in between.
• You can concatenate multiple modifiers, such as .stop.prevent.
• Event modifiers can be used together with regular JavaScript modifiers, such as .once().

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