Vue-formily is a simple, lightweight, and flexible schema-based form for Vue.js. Which is easy to handle and builds faster form by the schema. you can view its demo here.

Features

• Flexible: Easily to handle from basic to nested forms, group of forms.
• Dynamically: Generate form components dynamically.
• Schema: Build faster form by the schema.
• Lightweight: Small built size. Gzip: ~5 KB
• Validation: Validate form elements with built-in Rules that covers most needs in most web applications
• Plugins: Extend functionally by third-party plugins or your own plugins.
• Extensibility: Easily make your own custom form element by extending the core elements.

Installation

CDN

You can use vue-formily with a script tag and a CDN, import the library like this:

<script src="https://unpkg.com/@vue-formily/formily@latest"></script>

This will inject a VueFormily global object, which you will use to access the various components, funtions exposed by vue-formily.
If you are using native ES Modules, there is also an ES Modules compatible build:

<script type="module">
  import Vue from 'https://unpkg.com/@vue-formily/formily@latest/dist/formily.esm.js'
</script>

NPM

//install with yarn
yarn add @vue-formily/formily

//install with npm
npm install @vue-formily/formily --save

Setup

Vue 3.x

import { createApp } from 'vue'
import { createFormily } from '@vue-formily/formily';
const formily = createFormily();
const app = createApp(App)

app.use(formily, {
  // By default, vue-formily will execute the 
  // validation silently when changing element's value.
  // To disable it, just set the `silent` to `false`.
  // When disabled, the element has to be validated manually 
  // by calling the `element.validate()` method.
  silent?: boolean;
  // The default rules want to apply to the form.
  // With rules that have the `cascade = true`,
  // then thay can apply to all the child elements.
  rules: [];
  // The alias of the object contains all the form references
  // that will be injected to Vue instance
  alias: 'forms';
});

Vue 2.x

import Vue from 'vue';
import VueFormily from '@vue-formily/formily';
Vue.use(VueFormily, {
  // By default, vue-formily will execute the 
  // validation silently when changing element's value.
  // To disable it, just set the `silent` to `false`.
  // When disabled, the element has to be validated manually 
  // by calling the `element.validate()` method.
  silent?: boolean;
  // The default rules want to apply to the form.
  // With rules that have the `cascade = true`,
  // then thay can apply to all the child elements.
  rules: [];
  // The alias of the object contains all the form references
  // that will be injected to Vue instance
  alias: 'forms';
});

Basic Usage

Let’s start with a simple login form:

Defining Form Schema

vue-formily need a form schema to work with, so let’s define one:

const loginForm = {
  formId: "login",
  fields: [
    {
      formId: "email",
      type: "string",
      rules: [
        {
          ...required,
          message: "Please enter email address.",
        },
        {
          ...email,
          message: "Please enter valid email address.",
        },
      ],
      props: {
        label: "email",
        inputType: "email"
      },
    },
    {
      formId: "password",
      type: "string",
      rules: [
        {
          ...required,
          message: "Please enter password.",
        },
      ],
      props: {
        label: "password",
        inputType: "password"
      },
    },
  ],
};

Create New Form

Then we call $formily.add to create new form element and injects it to Vue instance’s forms object.

<template>
  <form class="login">
    <div v-for="(field, i) in forms.login.fields" :key="i" class="field">
      <label :for="field._uid">{{ field.label }}</label>
      <input v-model="field.raw" :type="field.props.inputType" :name="field.name" :id="field._uid" />
    </div>
  </form>
</template>

<script>
export default {
  created() {
    // Create new form element and injects it to `forms` object.
    this.$formily.add(loginForm);
  }
}
</script>

You can see its documentation here.