source: trip-planner-front/node_modules/@angular/platform-browser/esm2015/src/dom/debug/by.js@ ceaed42

/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
import { ɵgetDOM as getDOM } from '@angular/common';
/**
 * Predicates for use with {@link DebugElement}'s query functions.
 *
 * @publicApi
 */
export class By {
    /**
     * Match all nodes.
     *
     * @usageNotes
     * ### Example
     *
     * {@example platform-browser/dom/debug/ts/by/by.ts region='by_all'}
     */
    static all() {
        return () => true;
    }
    /**
     * Match elements by the given CSS selector.
     *
     * @usageNotes
     * ### Example
     *
     * {@example platform-browser/dom/debug/ts/by/by.ts region='by_css'}
     */
    static css(selector) {
        return (debugElement) => {
            return debugElement.nativeElement != null ?
                elementMatches(debugElement.nativeElement, selector) :
                false;
        };
    }
    /**
     * Match nodes that have the given directive present.
     *
     * @usageNotes
     * ### Example
     *
     * {@example platform-browser/dom/debug/ts/by/by.ts region='by_directive'}
     */
    static directive(type) {
        return (debugNode) => debugNode.providerTokens.indexOf(type) !== -1;
    }
}
function elementMatches(n, selector) {
    if (getDOM().isElementNode(n)) {
        return n.matches && n.matches(selector) ||
            n.msMatchesSelector && n.msMatchesSelector(selector) ||
            n.webkitMatchesSelector && n.webkitMatchesSelector(selector);
    }
    return false;
}
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