How to realize the difference between number input box and text input box in Vue

In Vue, we often need to use input boxes for users to input data, but different input boxes have different restrictions and verification rules. For example, the number input box needs to be restricted to only numbers, but the text input box does not need to be restricted. Input type. This article will introduce how to realize the difference between number input box and text input box in Vue.

1. Use the type attribute to distinguish the input box type

In Vue, you can use the type attribute to distinguish the input box into different types. For example, type="text" means text input box, type ="number" indicates a number input box. When using the type attribute, you can also set other values, such as type="password" for the password box, type="email" for the email input box, type="tel" for the phone input box, etc.

<template>
  <div>
    <label>文本输入框：</label>
    <input type="text" v-model="textValue"></input>
    <br>
    <label>数字输入框：</label>
    <input type="number" v-model.number="numberValue"></input>
  </div>
</template>

<script>
export default {
  data() {
    return {
      textValue: '',
      numberValue: 0
    }
  }
}
</script>

In the above code, we created two input boxes, one is a text input box and the other is a number input box. By setting the type attribute differently, we can easily distinguish the two types of input boxes.

2. Use v-model.number to filter non-numeric characters

Although the type attribute can be used to limit the input type of the input box, users can still enter non-numeric characters. In order to ensure that only numbers can be entered into the number input box, we need to use the v-model.number directive to filter non-numeric characters.

<template>
  <div>
    <label>数字输入框：</label>
    <input type="number" v-model.number="numberValue"></input>
  </div>
</template>

<script>
export default {
  data() {
    return {
      numberValue: 0
    }
  }
}
</script>

In the above code, we only need to add the .number modifier to the v-model directive to implement the function of filtering non-numeric characters. In this way, even if the user tries to enter non-numeric characters, Vue will automatically filter them out to ensure that there are only numeric characters in the input box.

3. Use min and max attributes to limit the number input range

In addition to limiting the input type and filtering non-numeric characters, the number input box can also limit the numbers that can be entered by setting the min and max attributes. scope.

<template>
  <div>
    <label>数字输入框（0-100）：</label>
    <input type="number" v-model.number="numberValue" min="0" max="100"></input>
  </div>
</template>

<script>
export default {
  data() {
    return {
      numberValue: 0
    }
  }
}
</script>

In the above code, we limit the numerical input range to between 0 and 100 by setting the min and max attributes. If the number entered by the user is less than 0 or greater than 100, the input box will automatically turn red and cannot be submitted.

Summary

By using the type attribute, v-model.number directive and min and max attributes, we can easily realize the difference between the number input box and the text input box. In actual development, we only need to use these knowledge points flexibly to provide users with a better input experience.

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