angular_scopewalker.js

function walkScope(scope) {
    function processLevel(scope, idCache) {
        if (scope == null)
            return null;

        if (idCache.indexOf(scope.$id) >= 0)
            return null;

        idCache.push(scope.$id);

        let level = {};
        let curScopeObj = {id: scope.$id, scope: scope, childs: []};
        curScopeObj.childs = processLevel(scope.$$childHead, idCache);

        level[curScopeObj.id] = curScopeObj;

        let nextScope = scope.$$nextSibling;
        while (nextScope != null) {
            if (idCache.indexOf(nextScope.$id) >= 0)
                continue;

            idCache.push(nextScope.$id);
            let nextScopeObj = {id: nextScope.$id, scope: nextScope, childs: []};
            nextScopeObj.childs = processLevel(nextScope, idCache);
            level[nextScopeObj.id] = nextScopeObj;
            nextScope = nextScope.$$nextSibling;
        }

        return level;
    }

    let idCache = [];
    return processLevel(scope, idCache);
}

Usage:

const scopes = walkScope($("html").scope());