Easy to Use Vue.js Form Input Validation Plugin

vee-validate is a form validation library for VueJs that allows you to validate inputs and build better form UIs in a familiar declarative style or using composition functions

See the Pen
Dynamic Form Generator
by Abdelrahman Awad (@logaretm)
on CodePen.

Features

  • 🍞 Easy: Declarative validation that is familiar and easy to setup
  • 🧘‍♀️ Flexible: Synchronous, Asynchronous, field-level or form-level validation
  • ⚡️ Fast: Build faster forms faster with intuitive API and small footprint
  • 🏏 Minimal: Only handles the complicated and painful form concerns, gives you full control over everything else
  • 🍤 Tiny: Small footprint < 5kb which makes your apps faster to load
  • 😎 UI Agnostic: Works with native HTML elements or your favorite UI library components
  • 🦾 Progressive: Works with any setup whether you use Vue.js as a progressive enhancement or in a complex setup
  • ✅ Built-in Rules: Companion lib with 25+ Rules that covers most needs in most web applications
  • 🌐 i18n: 45+ locales for built-in rules contributed by developers from all over the world

Getting Started

Installation

# install with yarn
yarn add [email protected]

# install with npm
npm install [email protected] --save

Vue version support

The main v4 version supports Vue 3.x only, for previous versions of Vue, check the following the table

vue Version vee-validate version Documentation Link
2.x 2.x or 3.x v2 or v3
3.x 4.x v4

Usage

Declarative Components (Recommended)

Higher-order components are better suited for most of your cases. Register the Field and Form components and create a simple required validator:

import { Field, Form } from 'vee-validate';

export default {
  components: {
    Field,
    Form,
  },
  methods: {
    isRequired(value) {
    return value ? true : 'This field is required';
  },
};

Then use the Form and Field components to render your form:

<Form v-slot="{ errors }">
  <Field name="field" :rules="isRequired" />

  <span>{{ errors.field }}</span>
</Form>

The Field component renders an input of type text by default but you can control that

Composition API

If you want more fine grained control, you can use useField function to compose validation logic into your component:

import { useField } from 'vee-validate';

export default {
  setup() {
    // Validator function
    const isRequired = value => (value ? true : 'This field is required');
    const { value, errorMessage } = useField('field', isRequired);

    return {
      value,
      errorMessage,
    };
  },
};

Then in your template use v-model to bind the value to your input and display the errors using errorMessage:

<input name="field" v-model="value" />
<span>{{ errorMessage }}</span>

See live demo and download source code.

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This awesome script developed by logaretm. Visit their official repository for more information and follow for future updates.


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