Examples with WebComponents com.vaadin.flow.component.WebComponents used on opensource projects

Example 1 with WebComponents

use of com.vaadin.flow.component.WebComponents in project flow by vaadin.

the class BootstrapHandler method appendWebComponentsPolyfills.

private static void appendWebComponentsPolyfills(Element head, BootstrapContext context) {
    Optional<WebComponents> webComponents = AnnotationReader.getAnnotationFor(context.getUI().getClass(), WebComponents.class);
    DeploymentConfiguration config = context.getSession().getConfiguration();
    String webComponentsPolyfillBase = config.getWebComponentsPolyfillBase().orElse(null);
    if (webComponentsPolyfillBase == null) {
        return;
    }
    assert webComponentsPolyfillBase.endsWith("/");
    boolean loadEs5Adapter = config.getBooleanProperty(Constants.LOAD_ES5_ADAPTERS, webComponents.map(WebComponents::loadEs5Adapter).orElse(true));
    if (loadEs5Adapter && !context.getSession().getBrowser().isEs6Supported()) {
        // This adapter is required since lots of our current customers use
        // polymer-cli to transpile sources,
        // this tool adds babel-helpers dependency into each file, see:
        // https://github.com/Polymer/polymer-cli/blob/master/src/build/build.ts#L64
        // and
        // https://github.com/Polymer/polymer-cli/blob/master/src/build/optimize-streams.ts#L119
        head.appendChild(createInlineJavaScriptElement(BABEL_HELPERS_JS));
    }
    head.appendChild(createJavaScriptElement(context.getUriResolver().resolveVaadinUri(webComponentsPolyfillBase + "webcomponents-loader.js"), false));
}