find object from JavaScript codeString

############## FOR EXCTRACTING AN OBJECT DEFINED INSIDE A STRING CONTAINING JavaScript CODE ##############
################################################ examples ################################################
# findObj_inJS('x=90; y=50; z=3;', 'z') # returns # 3
# findObj_inJS('x=90; y=50; z=3;', ['x', 'y', 'z']) # returns # {'x': 90, 'y': 50, 'z': 3}
# findObj_inJS('d = {"x": 90, "y": 50, "z": 3}', '"x"') # returns # 90
# findObj_inJS('d = {"x": 90, "y": 50, "z": 3}', ['d']) # returns # {'d': {'x': 90, 'y': 50, 'z': 3}}
##########################################################################################################


#!pip install slimit # https://slimit.readthedocs.io/en/latest/
import slimit
from slimit.visitors import nodevisitor

import json

def findObj_inJS(jsStr, objName, findAll=False, jStrict=True, printErr=False):
    tree = slimit.parser.Parser().parse(jsStr)
    objList = objName if isinstance(objName, list) else [objName]
    toRet = {k: [] for k in objList}

    for n in nodevisitor.visit(tree):
        if not objList: break
        for c in (n.children() if hasattr(n, 'children') else [n]):
            if not objList: break
            if not (hasattr(c, 'left') and hasattr(c, 'right')): continue
            cName, cVal = c.left.to_ecma(), c.right.to_ecma()

            if cName in objList:
                try: toRet[cName].append(json.loads(cVal))
                except Exception as e:
                    if printErr: print(type(e), e)
                    if not jStrict: toRet[cName].append(cVal)
                if toRet[cName] and not findAll: objList.remove(cName)

    for k, v in toRet.items():
        if printErr and not v: print('not found: ', k)
        if not findAll: toRet[k] = v[0] if v else None
    return toRet if isinstance(objName, list) else toRet[objName]