How to use v-on:mousemove to listen to mouse movement events in Vue

Vue is a flexible, efficient, and easy-to-learn front-end framework. It provides us with a wealth of instructions and events to help developers quickly build interactive web applications. Among them, v-on:mousemove is the mouse movement event command provided by Vue, which can be used to monitor the movement of the mouse on the element. This article will introduce how to use v-on:mousemove in Vue, as well as some related development tips and precautions.

1. v-on: Basic usage of mousemove

In Vue, we can use the v-on directive to bind the event listener of the element, where v-on The :mousemove directive is used to listen for mouse movement events on elements. Its basic syntax format is as follows:

<div v-on:mousemove="handleMouseMove"></div>

In the above code, v-on:mousemove is bound to an event listener. When the mouse moves on the element, the handleMouseMove method will be triggered.

In Vue, we can also use the @mousemove abbreviation instruction to replace the v-on:mousemove instruction, as shown below:

<div @mousemove="handleMouseMove"></div>

The effect of these two methods is the same, both are OK Listen to mouse movement events on the element.

2. Parameters for monitoring mouse movement events

When using the v-on:mousemove directive, we can provide an $event parameter for the event listener, representing the mouse movement event object . Through this parameter, we can obtain the coordinate position of the mouse on the element, the direction of movement, whether the left and right mouse buttons are pressed, and other information.

The following is a sample code:

<template>
  <div class="container" v-on:mousemove="handleMouseMove($event)">
    <span>{{ x }}, {{ y }}</span>
  </div>
</template>

<script>
export default {
  data() {
    return {
      x: 0,
      y: 0
    }
  },
  methods: {
    handleMouseMove(event) {
      this.x = event.clientX;
      this.y = event.clientY;
    }
  }
}
</script>

In the above code, we bound an event listener to the container element and obtained the coordinate position of the mouse on the element through the $event parameter. Then display the location information in the span tag.

3. Limited scope of monitoring mouse movement events

During the development process, we sometimes need to limit the triggering range of mouse movement events to avoid monitoring and deal with. To do this, we can use the modifiers provided by Vue to implement event restrictions.

For example, we can use the modifier .stop to prevent the event from bubbling, thereby limiting the scope of the event. The sample code is as follows:

<template>
  <div class="container" v-on:mousemove.stop="handleMouseMove">
    <span>{{ x }}, {{ y }}</span>
  </div>
</template>

<script>
export default {
  data() {
    return {
      x: 0,
      y: 0
    }
  },
  methods: {
    handleMouseMove(event) {
      this.x = event.clientX;
      this.y = event.clientY;
    }
  }
}
</script>

In the above code, we limit the bubbling of events through the .stop modifier, so that only the mouse movement event of the container element will be triggered and will not affect the event processing of other elements.

4. Summary

v-on:mousemove is one of the commonly used event instructions in Vue, which can be used to monitor mouse movement events on elements. We can obtain mouse position information through the $event parameter, or limit the trigger range of the event through modifiers. In actual development, we should also pay attention to the performance optimization of event processing functions and the improvement of code robustness.

The above is the detailed content of How to use v-on:mousemove to listen to mouse movement events in Vue. For more information, please follow other related articles on the PHP Chinese website!