Vue Academy #2: V-model directive

Welcome to the second vue academy ! It will be a list of lot of article on vue! I have 2.5 years of experience in this and I can teach a few thing about this !

For this course we will focus on v-model directive !

Let's start

First problematic, how do we manage an input value in <input> ?

We could do the next :

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

<template>
<div>
    <input
        :value="message"
        @input="updateMessage"
        >
</div>
</template>

We need to bind value of input to our current data message and handle event from this input in order to update our current data message.

It's not really friendly and we have to do this for every component...

v-model

You can use the v-model directive to create two-way data bindings on form input, textarea, and select elements. It automatically picks the correct way to update the element based on the input type.

So we can replace the code above by

<script>
export default {
  name: "HelloWorld",
  data: function () {
    return {
      message: '',
    }
  },
};
</script>

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