just-validate
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Modern, simple, lightweight (~5kb gzip) form validation library written in Typescript, with no dependencies (no JQuery!). Support a wide range of predefined rules, async, files, dates validation, custom error messages and styles, localization. Support wri
Modern, simple, lightweight (~5kb gzip) form validation library written in Typescript, with no dependencies (no JQuery!). Support a wide range of predefined rules, async, files, dates validation, custom error messages and styles, localization. Supporting writing custom rules and plugins.
It's a right choice for you, if you have a site, a landing page without React, JQuery etc. and you want to quick, simple and powerful solution for validating your form.
npm install just-validate --save
yarn add just-validate
And then use it as an imported module:
import JustValidate from 'just-validate';
const validate = new JustValidate('#form');
Or if you don't use module bundlers, just include JustValidate script on your page from CDN and call it as window.JustValidate:
<script src="https://unpkg.com/just-validate@latest/dist/just-validate.production.min.js"></script>
<body>
<script>
const validate = new window.JustValidate('#form');
</script>
</body>
There are plenty of rules which you could use out of the box:
Let's say we have a basic HTML layout:
<form action="#" id="form" autocomplete="off">
<label for="name">Enter your name</label>
<input
type="text"
class="form__input form-control"
placeholder="Enter your name"
autocomplete="off"
name="name"
id="name"
/>
<label for="email">Enter your email</label>
<input
type="email"
class="form__input form-control"
placeholder="Enter your email"
autocomplete="off"
name="email"
id="email"
/>
<button class="btn btn-primary" id="submit-btn">Submit</button>
</form>
Next, let's add JustValidate to our layout and define some simple rules.
First, we should create the instance new JustValidate('#form') by passing a form selector, or the element as an argument.
Second, we call .addField() with a field selector as the first argument and an array of rules as the second argument.
const validation = new JustValidate('#form');
validation
.addField('#name', [
{
rule: 'minLength',
value: 3,
},
{
rule: 'maxLength',
value: 30,
},
])
.addField('#email', [
{
rule: 'required',
errorMessage: 'Email is required',
},
{
rule: 'email',
errorMessage: 'Email is invalid!',
},
]);
And that's it! Now our form is validated!
Please, check out the examples and documentation. Or try the playground.
FAQs
Modern, simple, lightweight (~5kb gzip) form validation library written in Typescript, with no dependencies (no JQuery!). Support a wide range of predefined rules, async, files, dates validation, custom error messages and styles, localization. Support wri
We found that just-validate demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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