my proble is about button when clicked on it it didnot run that show new menu

i make code js for icon beager in header so i due to when user click on it show new bakground-color that in it is ul ect

this code js i think my problem is in js

let bgc_menu_header = document.querySelector(".bgc_menu_header")
let menuBtn = document.querySelector(".btn-beager-icon")
let menuBtnicon = document.querySelector(".btn-beager-icon img")

bgc_menu_header.addEventListener("click", function(){
   if (menuBtnicon.classList.contains("menu_header")){
    bgc_menu_header.style.left = "0";
    menuBtnicon.classList="menu_header"
   } else{
        bgc_menu_header.style.left = "-299px";
    menuBtnicon.classList="menu_header"
   }
})