1 2 <!--- 3 4 This README is automatically generated from the comments in these files: 5 iron-checked-element-behavior.html 6 7 Edit those files, and our readme bot will duplicate them over here! 8 Edit this file, and the bot will squash your changes :) 9 10 --> 11 12 [](https://travis-ci.org/PolymerElements/iron-checked-element-behavior) 13 14 _[Demo and API Docs](https://elements.polymer-project.org/elements/iron-checked-element-behavior)_ 15 16 17 ##Polymer.IronCheckedElementBehavior 18 19 20 Use `Polymer.IronCheckedElementBehavior` to implement a custom element 21 that has a `checked` property, which can be used for validation if the 22 element is also `required`. Element instances implementing this behavior 23 will also be registered for use in an `iron-form` element. 24 25 26