Vuetify: How to restore the input value in v-text-field

This app is designed with a simple v-text-field for user input. The issue I am facing is that when I enter a combination of numbers and letters like 11a, then quickly tab out or click out of the input field before losing focus, it only shows 11. However, once the focus is lost completely, it displays the entire text including the letter. I'm not sure why the last symbol is being restored in this way and how to fix it. Can someone help me identify what mistake I am making?

<div id="app">
    <h1>{{message}}</h1>

    <v-text-field @input.native="setOnlyNumber" />
  </div>
</template>

<script>
export default {
  data() {
    return {
      message: 'Welcome to Vue!'
    };
  },
  methods: {
    setOnlyNumber(e) {
      e.target.value = e.target.value.replace(/\D+/, '');
    }
  }
};
</script>

Answer №1

Utilize the attribute type="number" within the <v-text-field> element.

See It in Action:

Vue.use(Vuetify);

var vm = new Vue({
    el: "#app",
  data() {
    return {
      message: 'Welcome to Vue!'
    };
  }
});
<link href="https://cdn.jsdelivr.net/npm/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="d0a6a5b5a4b9b6a990e2fea8">[email protected]</a>/dist/vuetify.min.css" rel="stylesheet">
<script src="https://cdn.jsdelivr.net/npm/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="96e0e3f3d6a4b8ee">[email protected]</a>/dist/vue.js"></script>
  <script src="https://cdn.jsdelivr.net/npm/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="582e2d3d2c313e21186a7620">[email protected]</a>/dist/vuetify.js"></script>

<div id="app">
  <h1>{{message}}</h1>
  <v-text-field type="number" label="Number Input Field"/>
</div>

The author suggests including the following code snippet to accept only numbers and alphabets when inputting text.

Vue.use(Vuetify);

var vm = new Vue({
    el: "#app",
  data() {
    return {
      message: 'Welcome to Vue!'
    };
  },
  methods: {
    validateInput(e) {
      let char = String.fromCharCode(e.keyCode); // Retrieve the character
      if(/^[0-9A-Za-z]+$/.test(char)) return true; // Check against regex 
      else e.preventDefault(); // If no match, prevent adding to input text
    }
  }
});
<link href="https://cdn.jsdelivr.net/npm/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="2d5b584859444b546d1f0355">[email protected]</a>/dist/vuetify.min.css" rel="stylesheet">
<script src="https://cdn.jsdelivr.net/npm/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="7b0d0e1e3b495503">[email protected]</a>/dist/vue.js"></script>
  <script src="https://cdn.jsdelivr.net/npm/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="7f090a1a0b1619063f4d5107">[email protected]</a>/dist/vuetify.js"></script>

<div id="app">
  <h1>{{message}}</h1>
  <v-text-field type="text" label="Number Input Field" v-on:keypress="validateInput($event)"/>
</div>

Answer №2

If you're looking for a simple solution, consider utilizing the Number type input provided by HTML5.

The v-text-field component can easily incorporate this type using the 'number' flag like so:

<v-text-field type='number' />

Alternatively, you have the option to bind data and implement validation logic as shown below:

<template>
  <div id="app">
    <h1>{{message}}</h1>

    <v-text-field v-model='number' @change="validate" />
  </div>
</template>

<script>
export default {
  data() {
    return {
      message: 'Welcome to Vue!',
      number: null,
    };
  },
  methods: {
    validate() {
      this.number = this.number.toString().replace(/\D+/, '');
    }
  }
};
</script>

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