Function target

docs/app/js/sanddance-app.js:141995–142005

* Bind the signal to an external EventTarget.

(bind2, node, param, view)

/**
 * Bind the signal to an external EventTarget.
 */ function target(bind2, node, param, view) {
    const type = param.event || "input";
    const handler = ()=>bind2.update(node.value); // initialize signal value to external input value
    view.signal(param.signal, node.value); // listen for changes on the element
    node.addEventListener(type, handler); // register with view, so we can remove it upon finalization
    trackEventListener(view, node, type, handler); // propagate change to element
    bind2.set = (value)=>{
        node.value = value;
        node.dispatchEvent(event(type));
    };
}
function event(type) {
    return typeof Event !== "undefined" ? new Event(type) : {
        type