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    @polymer/iron-validator-behavior
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    3.0.1 • Public • Published

    Published on NPM Build status Published on webcomponents.org

    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

    Installation

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

    In a Polymer 3 element that is a validator

    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);

    Using this validator element in an html file

    <html>
      <head>
        <script type="module">
          import '../sample-validator.js';
        </script>
      </head>
      <body>
        <sample-validator id="aValidator"></sample-validator>
        <input id="input">
        <script>
          input.addEventListener('input', function(event) {
            var valid = aValidator.validate(input.value);
            if (valid)
              input.removeAttribute('invalid');
            else
              input.setAttribute('invalid', true);
          });
        </script>
      </body>
    </html>

    Contributing

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

    Installation

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

    Running the demo locally

    polymer serve --npm
    open http://127.0.0.1:<port>/demo/

    Running the tests

    polymer test --npm

    Install

    npm i @polymer/iron-validator-behavior

    DownloadsWeekly Downloads

    2,453

    Version

    3.0.1

    License

    BSD-3-Clause

    Unpacked Size

    17.2 kB

    Total Files

    9

    Last publish

    Collaborators

    • aomarks
    • emarquez
    • sorvell
    • bicknellr
    • usergenic
    • polymer-devs
    • azakus
    • kevinpschaaf
    • justinfagnani