How to get the value of uniapp text box

Uniapp is a cross-platform development framework that can simplify the process of developers developing applications on multiple platforms and improve development efficiency. The text box is one of the commonly used components when developing applications, and how to get the value in the text box is a very common problem. This article will introduce how to get the value in the text box in uniapp.

1. Use v-model to implement two-way data binding

In uniapp, you can use the v-model directive to implement two-way data binding. Add the v-model instruction to the text box to bind the value of the text box to the data in the vue instance, so that the value in the text box can be obtained by obtaining the data in the vue instance.

For example:

<template>
  <div>
    <input v-model="value" />
    <button @click="getValue">获取输入框的值</button>
  </div>
</template>

<script>
export default {
  data() {
    return {
      value: ''
    }
  },
  methods: {
    getValue() {
      console.log(this.value)
    }
  }
}
</script>

2. Use the $refs attribute to obtain the text box instance

The $refs attribute is provided in vue, and the text box can be obtained through this attribute corresponding instance. The value in the text box can be obtained through the instance.

For example:

<template>
  <div>
    <input ref="myInput" />
    <button @click="getValue">获取输入框的值</button>
  </div>
</template>

<script>
export default {
  methods: {
    getValue() {
      console.log(this.$refs.myInput.value)
    }
  }
}
</script>

3. Listen to the input event to obtain the value in the text box in real time

You can obtain the value in the text box in real time by listening to the input event. The input event is triggered when content is entered in the text box, and the value in the text box is obtained in the event.

For example:

<template>
  <div>
    <input @input="getValue" />
  </div>
</template>

<script>
export default {
  methods: {
    getValue(e) {
      console.log(e.target.value)
    }
  }
}
</script>

Summary

Use the v-model directive, $refs attribute and input event to obtain the value in the text box respectively, and select the appropriate one according to the specific usage scenario method. In actual development, obtaining the value in the text box is a very common operation. Mastering these methods can improve development efficiency.

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