can/demos/forms/advanced-sticky.html

MIT-licensed, client-side, JavaScript framework that makes building rich web applications easy.

<sticky-uppercase></sticky-uppercase>

<script src="../../node_modules/steal/steal.js" dev-bundle main="@empty" id="demo-source">
import { StacheElement } from "can";

class StickyUppercase extends StacheElement {
    static view = `
        <label>
            scopeProp:
            <input type="text" value:bind="this.scopeProp">
        </label>

        <p>scopeProp: {{ this.scopeProp }}</p>
    `;

    static props = {
        set scopeProp(val) {
            return val.toUpperCase();
        }
    };
};
customElements.define("sticky-uppercase", StickyUppercase);
</script>