Function trap

docs/app/js/sanddance-app.js:142161–142169

(view, fn)

    return r.initialize(el, width(view), height(view), offset(view), scaleFactor, opt).background(view.background());
}
function trap(view, fn) {
    return !fn ? null : function() {
        try {
            fn.apply(this, arguments);
        } catch (error) {
            view.error(error);
        }
    };
}
function initializeHandler(view, prevHandler, el, constructor) {
    // instantiate scenegraph handler
    const handler = new constructor(view.loader(), trap(view, view.tooltip())).scene(view.scenegraph().root).initialize(el, offset(view), view); // transfer event handlers