How to convert data to int type in vue

Vue is a popular JavaScript framework that is widely used in Web front-end development. During the development process of Vue, we often encounter data type conversion problems, especially converting strings to integers. This article will introduce how to convert data to int type in Vue.

1. Use the parseInt function to convert

parseInt is a global function provided by JavaScript that can convert a string into an integer value. In Vue development, this function can be used directly for conversion. The following is a simple example:

<template>
  <div>
    <input type="text" v-model="numStr">
    <button @click="convertToInt">转换</button>
    <p>{{ numInt }}</p>
  </div>
</template>

<script>
export default {
  data() {
    return {
      numStr: '',
      numInt: 0
    }
  },
  methods: {
    convertToInt() {
      this.numInt = parseInt(this.numStr)
    }
  }
}
</script>

In the above example, the data in the input box is bound to the numStr variable through the v-model instruction, and then the convertToInt method is triggered by clicking the button. In this method, use The parseInt function converts numStr to an integer value, and finally binds the converted value to the numInt variable.

2. Use operator conversion

In addition to using the parseInt function for type conversion, Vue also supports automatic type conversion using operators. For example, when operations are involved, Vue will automatically convert strings to integers, so developers do not need to manually perform type conversions. The following is an example:

<template>
  <div>
    <input v-model="num1" type="text">
    <input v-model="num2" type="text">
    <button @click="add">相加</button>
    <p>{{ result }}</p>
  </div>
</template>

<script>
export default {
  data() {
    return {
      num1: '',
      num2: '',
      result: 0
    }
  },
  methods: {
    add() {
      this.result = this.num1 + this.num2
    }
  }
}
</script>

In the above example, we defined two input input boxes, bound to the num1 and num2 variables respectively, and then accumulated num1 and num2 through an addition method, and finally Bind the result to the result variable. When adding, Vue will automatically convert the input string into an integer.

3. Use *1 and other methods to convert

In addition to the above two methods, Vue also supports some other type conversion methods. For example, use the *1 operator to convert a string to a number. The following is an example:

<template>
  <div>
    <input v-model="number" type="text">
    <button @click="convert">转换</button>
    <p>{{ result }}</p>
  </div>
</template>

<script>
export default {
  data() {
    return {
      number: '',
      result: 0
    }
  },
  methods: {
    convert() {
      this.result = this.number * 1
    }
  }
}
</script>

In the above example, we define an input box, bind the value of the input box to the number variable, and then use the *1 operator to convert the number to Number, and finally bind the result to the result variable.

To sum up, we introduced how to convert string type to integer type in Vue. Developers can choose the appropriate method for type conversion based on their own needs.

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