Work With Firebase Custom Claims in WordPress

firebase-custom-claims-wordpress.js

// https://gist.github.com/dalenguyen/650ab896086f3213e81eda5e96efe3d3

(function ($) {
    'use strict';
    $(document).ready(function () {
        const showFirestoreDatabase = () => {
            ...
        }
        // We won't call the function directly here
        // showFirestoreDatabase()
        const getUserCustomClaims = () => {
            firebase.auth().onAuthStateChanged(function (user) {
                firebase.auth().currentUser.getIdTokenResult()
                .then((idTokenResult) => {
                    // Confirm the user is an Admin.
                    if (!!idTokenResult.claims.admin) {
                        // We will call the function here
                        showFirestoreDatabase()                        
                    } else {
                        // Show something else 
                    }
                })
                .catch((error) => {
                    console.log(error);
                });
            });
        }
        getUserCustomClaims()
    })
})(jQuery)