How to use v-model to bind the abbreviation of form elements in Vue

Abbreviation for how to use v-model to bind form elements in Vue

Vue is a popular JavaScript framework that enables quickly building interactive applications. Vue provides many practical directives, one of the most commonly used is "v-model".

The "v-model" directive can be used to bind form elements with data properties in a Vue instance. The "v-model" directive can automatically update data attributes when the user changes the form input, and when the data attribute changes, the form input will also automatically update.

However, in actual applications, the "v-model" directive may sometimes appear cumbersome and lengthy. So Vue provides some abbreviations for the "v-model" directive to make it more convenient when writing code.

Below we will introduce how to use the abbreviation of the "v-model" directive in Vue.

1. Abbreviation of text box
The "v-model" command of the text box can be abbreviated with "v-model="msg"". Among them, msg is the name of the data attribute in the Vue instance.

For example:

<template>
  <div>
    <input v-model="msg" placeholder="请输入文本">
    <p>{{ msg }}</p>
  </div>
</template>

<script>
  export default {
    data() {
      return {
        msg: ''
      }
    }
  }
</script>

is abbreviated to:

<template>
  <div>
    <input :value="msg" @input="msg=$event.target.value" placeholder="请输入文本">
    <p>{{ msg }}</p>
  </div>
</template>

<script>
  export default {
    data() {
      return {
        msg: ''
      }
    }
  }
</script>

2. Abbreviation of multi-select box
The "v-model" command of the multi-select box can be used ":checked ="checkedValue"" and "@change="onCheckedChange"" to abbreviate.

For example:

<template>
  <div>
    <input type="checkbox" v-model="checkedValue">
    <p>{{ checkedValue }}</p>
  </div>
</template>

<script>
  export default {
    data() {
      return {
        checkedValue: ''
      }
    }
  }
</script>

is abbreviated to:

<template>
  <div>
    <input type="checkbox" :checked="checkedValue" @change="onCheckedChange">
    <p>{{ checkedValue }}</p>
  </div>
</template>

<script>
  export default {
    data() {
      return {
        checkedValue: ''
      }
    },
    methods: {
      onCheckedChange(event) {
        this.checkedValue = event.target.checked;
      }
    }
  }
</script>

3. Abbreviation of radio button
The "v-model" command of the radio button can be used ":checked ="checkedValue"" and "@change="onCheckedChange"" to abbreviate.

For example:

<template>
  <div>
    <input type="radio" v-model="checkedValue" value="1">
    <input type="radio" v-model="checkedValue" value="2">
    <p>{{ checkedValue }}</p>
  </div>
</template>

<script>
  export default {
    data() {
      return {
        checkedValue: ''
      }
    }
  }
</script>

is abbreviated to:

<template>
  <div>
    <input type="radio" :checked="checkedValue === '1'" @change="onCheckedChange('1')">
    <input type="radio" :checked="checkedValue === '2'" @change="onCheckedChange('2')">
    <p>{{ checkedValue }}</p>
  </div>
</template>

<script>
  export default {
    data() {
      return {
        checkedValue: ''
      }
    },
    methods: {
      onCheckedChange(value) {
        this.checkedValue = value;
      }
    }
  }
</script>

In summary, the abbreviation of the "v-model" directive in Vue makes the code more concise and easier to read, but Pay attention to the correct use of abbreviations. In actual development, you can choose to use a suitable abbreviation method according to your own needs.

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