@polymer/iron-validator-behavior


IronValidatorBehavior

Use IronValidatorBehavior to implement a custom input/form validator. Element
instances implementing this behavior will be registered for use in elements that implement
IronValidatableBehavior.

See: Documentation,
Demo.

Usage

$3

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

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

class SampleValidator extends mixinBehaviors([IronValidatorBehavior], PolymerElement){
// This validator only validates strings, and is only valid if
// the value is "cat".
function validate(value) {
return value === 'cat';
}
}
customElements.define('sample-validator', SampleValidator);
`

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`html










`

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-validator-behavior
cd iron-validator-behavior
npm install
npm install -g polymer-cli
`

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

$3

`sh
polymer test --npm
``