Several common ways to implement double-click events in Vue2

Preface

Handling user interactions, especially double-click events, in Vue 2, is a common requirement. Vue provides a concise way to bind events, including double-click events. This article will introduce several ways to implement double-click events in Vue 2.

1. Use the @dblclick directive

Vue allows you to use it directly in templates@dblclickInstructions to listen for double-click events.

Sample code

<template>
  <div @dblclick="handleDoubleClick">
    Double-click this area
  </div>
</template>

<script>
export default {
  methods: {
    handleDoubleClick() {
      alert('You double-clicked on this area!  ');
    }
  }
}
</script>

In this example, when the user is<div>When double-clicking on an element, it will triggerhandleDoubleClickmethod.

Consider anti-shake

In some cases, you may not want the double-click event to fire too frequently. At this time, anti-shake technology can be used.

Sample code

<template>
  <div @dblclick="handleDoubleClick">
    Double-click this area
  </div>
</template>

<script>
import _ from 'lodash'; // Introduce the debounce function in the lodash library
export default {
  methods: {
    handleDoubleClick: _.debounce(function() {
      alert('You double-clicked on this area!  ');
    }, 300) // Multiple double-clicks in 300ms will only trigger once  }
}
</script>

2. Use the addEventListener method

If you need more granular control, or want to dynamically add event listeners to the life cycle of a component, you can useaddEventListener。

Sample code

<template>
  <div ref="doubleClickArea">
    Double-click this area
  </div>
</template>

<script>
export default {
  mounted() {
    ();
  },
  beforeDestroy() {
    ();
  },
  methods: {
    addDoubleClickEvent() {
      const el = this.$;
      ('dblclick', );
    },
    removeDoubleClickEvent() {
      const el = this.$;
      ('dblclick', );
    },
    handleDoubleClick() {
      alert('You double-clicked on this area!  ');
    }
  }
}
</script>

In this example, we are in the component’smountedThe double-click event listener was added to the hook and inbeforeDestroyRemove it from the hook.

3. Use third-party libraries

There are some third-party libraries that provide richer event handling capabilities, such asvue-clickawayCan handle external events, andvue-draggableThe library provides drag and drop events.

Sample code

<template>
  <div v-dblclick="handleDoubleClick">
    Double-click this area
  </div>
</template>

<script>
import VDblclick from 'v-dblclick'; // Assumption of third-party libraries
export default {
  directives: {
    dblclick: VDblclick
  },
  methods: {
    handleDoubleClick() {
      alert('You double-clicked on this area!  ');
    }
  }
}
</script>

In this example, let's assume that there is av-dblclickA third-party library for directives that allows us to use double-click events in a way similar to built-in directives.

in conclusion

Implementing a double-click event in Vue 2 can choose the method that best suits your needs in a variety of ways. Whether using Vue's built-in@dblclickInstructions, or throughaddEventListenerMethods to manually add event listeners, Vue provides flexible ways to handle user interactions.

Summarize

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