@polymer/iron-validatable-behavior


IronValidatableBehavior

Use IronValidatableBehavior to implement an element that validates user input. By using this behaviour, your custom element will get a public validate() method, which
will return the validity of the element, and a corresponding invalid attribute,
which can be used for styling. Can be used alongside an element implementing
the IronValidatableBehavior behaviour.

See: Documentation,
Demo.

Usage

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``
npm install --save @polymer/iron-validatable-behavior
`

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`js
import {PolymerElement, html} from '@polymer/polymer';
import {mixinBehaviors} from '@polymer/polymer/lib/legacy/class.js';
import {IronValidatableBehavior} from '@polymer/iron-validatable-behavior/iron-validatable-behavior.js';

class SampleElement extends mixinBehaviors([IronValidatableBehavior], PolymerElement) {
static get template() {
return html


;

// Override this method if you want to implement custom validity
// for your element. This element is only valid if the value in the
// input is "cat".
function _getValidity() {
return this.$.input.value === 'cat';
}
}
}
customElements.define('sample-element', SampleElement);
`

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`html






Validate!


`

Contributing

If you want to send a PR to this element, here are
the instructions for running the tests and demo locally:

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`sh
git clone https://github.com/PolymerElements/iron-validatable-behavior
cd iron-validatable-behavior
npm install
npm install -g polymer-cli
`

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`sh
polymer serve --npm
open http://127.0.0.1:/demo/
`

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`sh
polymer test --npm
``