Function _createIdMaps

src/core/runtime/morph.js:217–225

(oldNode, newContent)

}

function _createIdMaps(oldNode, newContent) {
    var oldIdElements = _queryEltAndDescendants(oldNode, "[id]");
    var newIdElements = newContent.querySelectorAll("[id]");
    var persistentIds = _createPersistentIds(oldIdElements, newIdElements);
    var idMap = new Map();
    _populateIdMapWithTree(idMap, persistentIds, oldNode.parentElement, oldIdElements);
    _populateIdMapWithTree(idMap, persistentIds, newContent, newIdElements);
    return { persistentIds, idMap };
}

function _createPersistentIds(oldIdElements, newIdElements) {
    var duplicateIds = new Set(), oldIdTagNameMap = new Map();