@fluentui/dom-utilities/lib-amd/elementContains.js

DOM utilities for use within Fluent web components

define(["require", "exports", "./getParent"], function (require, exports, getParent_1) {
    "use strict";
    Object.defineProperty(exports, "__esModule", { value: true });
    exports.elementContains = void 0;
    /**
     * Determines whether or not a parent element contains a given child element.
     * If `allowVirtualParents` is true, this method may return `true` if the child
     * has the parent in its virtual element hierarchy.
     *
     * @public
     */
    function elementContains(parent, child, allowVirtualParents) {
        if (allowVirtualParents === void 0) { allowVirtualParents = true; }
        var isContained = false;
        if (parent && child) {
            if (allowVirtualParents) {
                if (parent === child) {
                    isContained = true;
                }
                else {
                    isContained = false;
                    while (child) {
                        var nextParent = (0, getParent_1.getParent)(child);
                        if (nextParent === parent) {
                            isContained = true;
                            break;
                        }
                        child = nextParent;
                    }
                }
            }
            else if (parent.contains) {
                isContained = parent.contains(child);
            }
        }
        return isContained;
    }
    exports.elementContains = elementContains;
});
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