What scenarios can event modifiers in vue be used for?
May 09, 2024 pm 02:33 PMVue.js event modifiers are used to add specific behaviors, including: preventing default behavior (.prevent) stopping event bubbling (.stop) one-time event (.once) capturing event (.capture) passive Event listening (.passive) adaptive modifier (.self) key modifier (.key)
Vue.js event modifier application Scenario
In Vue.js, event modifiers are a special syntax used to add specific behaviors to element event handlers. They allow developers to simplify event handling and make code simpler and more efficient.
Prevent default behavior (.prevent)
- Prevent the default behavior of an element, such as form submission or link jump.
- Prevents accidental submission of forms or prevents href link jumps.
Stop event bubbling (.stop)
- Prevents events from bubbling up to ancestor elements.
- Causes the event to be handled only on the element that triggered it.
One-time events (.once)
- Handle the event only once and then remove the event listener from the element.
- Can be used to initialize one-time components or unsubscribe from events that are no longer needed.
Capture events (.capture)
- Capture events starting from the root element during event bubbling.
- Allows developers to handle the early stages of events, before child elements are processed.
Passive event listening (.passive)
- Enable browser optimization to improve page scrolling and responsiveness.
- Prevent event handlers from preventing page scrolling and other browser optimizations.
Adaptive modifier (.self)
- Only handles events triggered by the element itself, excluding events triggered by child elements.
- Can be used to prevent events from accidentally bubbling between nested elements.
Key modifier (.key)
- In the event handler function, provide an event object whose key property contains the key that triggered the event.
- Conveniently detect specific keyboard input, such as carriage return or space bar.
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