Userdata still exist in homepage after clicked logout from another page

hello World,

i am trying a firebase ionic with user login and logout, when i pressed logout at a page, the home page userdata still exists, i tested using ion refresher, the userdata is gone when i manually refresh the page at chrome.

 <div *ngIf=" !=null ">
 <h5 style="padding-left: 20px;"> Welcome {{}}</h5>

<div *ngIf=" == null">
 <img class="slide-image1" src="{{ blue.productpicture }}" alt="">

the logout at .ts

logOut() {

firebase.auth().signOut().then(() => {
 alert("successful logout")
 }).catch(() => {
alert("Logout failed");

am i missing something during logout ?

thank you for guidance

:bowing_man: :bowing_man: :bowing_man: