How to get the vue text box

Vue.js is a popular JavaScript framework for building interactive user interfaces. In Vue, the text box is one of the important components for processing user input. This article will introduce how to create a text box in Vue and get its value.

1. Create a text box

To create a text box in Vue, you need to use Vue's v-model directive. This instruction binds the relationship between a variable and the text box. Any value entered into the text box will automatically update the value of the variable. Here is a simple text box example:

<template>
  <div>
    <input type="text" v-model="message">
  </div>
</template>

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

In this example, we create a text box and bind it with the message variable using the v-model directive. At this point, any value entered in the text box will automatically update the value of the message variable.

2. Get the value of the text box

Through the v-model directive, we can quickly create a text box in Vue. But how to get the value in the text box? We can use Vue's event mechanism to monitor changes in the text box value and obtain the value when needed.

In Vue, you can use the v-on directive to listen for events. We can use the v-on:input directive on the text box to listen for input events and get the value of the text box in the event handler. The following is an example:

<template>
  <div>
    <input type="text" v-model="message" v-on:input="updateMessage">
  </div>
</template>

<script>
export default {
  data() {
    return {
      message: ''
    }
  },
  methods: {
    updateMessage(event) {
      this.message = event.target.value;
    }
  }
}
</script>

In this example, we use the v-on:input directive on the text box to listen to the input event and obtain the value of the text box in the event handler updateMessage. We can use event.target.value to get the value of the text box and assign it to the message variable.

In addition to using the v-on directive to listen for events, we can also use the computed attribute to get the value of the text box. The value of the computed attribute is automatically updated based on its dependencies. By using getters and setters in the computed property, we can easily get and set the value of the text box. The following is an example of using computed properties:

<template>
  <div>
    <input type="text" v-model="message">
  </div>
</template>

<script>
export default {
  data() {
    return {
      message: ''
    }
  },
  computed: {
    messageValue: {
      get() {
        return this.message;
      },
      set(value) {
        this.message = value;
      }
    }
  }
}
</script>

In this example, we create a computed property messageValue. Through getters and setters, we can easily get and set the value in the text box. In the template, we still use the v-model directive to bind the text box to the message variable. Since computed properties use the message variable, entering any value into the text box automatically updates the messageValue.

Summary

In Vue, the text box is an important component used to process user input. By using the v-model directive, we can quickly create a text box and bind it to a variable. By listening to events or using the computed property, we can easily get the value of the text box and update the value if needed. Using these tips, we can quickly build interactive user interfaces in Vue.

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