问KnockoutJS +聚合物:键合断裂(铬外)

EN

(function (factory) {
    // Module systems magic dance.

    if (typeof require === "function" && typeof module === "object") {
        // CommonJS or Node: hard-coded dependency on "knockout"
        factory(require("knockout"));
    } else if (typeof define === "function" && define["amd"]) {
        // AMD anonymous module with hard-coded dependency on "knockout"
        define(["knockout"], factory);
    } else {
        // <script> tag: use the global `ko` object, attaching a `mapping` property
        factory(ko);
    }
}(function (ko) {

    if (typeof (ko) === undefined) { throw 'Knockout is required, please ensure it is loaded before loading this shim'; }

    if (WebComponents && WebComponents.flags.shadow && ShadowDOMPolyfill) {

        var _originalApplyBindings = ko.applyBindings;

        ko.applyBindings = function (viewModel, rootNode) {
            if (rootNode) {
                rootNode = ShadowDOMPolyfill.wrapIfNeeded(rootNode);
            } else {
                rootNode = ShadowDOMPolyfill.wrapIfNeeded(window.document.body);
            }
            _originalApplyBindings(viewModel, rootNode);
        }
    }
}));