@fluentui/dom-utilities/lib/setVirtualParent.js

DOM utilities for use within Fluent web components

/**
 * Sets the virtual parent of an element.
 * Pass `undefined` as the `parent` to clear the virtual parent.
 *
 * @public
 */
export function setVirtualParent(child, parent) {
    var virtualChild = child;
    var virtualParent = parent;
    if (!virtualChild._virtual) {
        virtualChild._virtual = {
            children: [],
        };
    }
    var oldParent = virtualChild._virtual.parent;
    if (oldParent && oldParent !== parent) {
        // Remove the child from its old parent.
        var index = oldParent._virtual.children.indexOf(virtualChild);
        if (index > -1) {
            oldParent._virtual.children.splice(index, 1);
        }
    }
    virtualChild._virtual.parent = virtualParent || undefined;
    if (virtualParent) {
        if (!virtualParent._virtual) {
            virtualParent._virtual = {
                children: [],
            };
        }
        virtualParent._virtual.children.push(virtualChild);
    }
}
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