get_my/client/UserConfig/userConfig.js

import { UserConfig } from "../../imports/api/userConfig";

Template.userConfig.onCreated(function() {

});

Template.userConfig.onRendered(function() {
    const getConfig = async() => {
        // console.log("tried to get switch config.")
        let myConfig = await UserConfig.findOneAsync({ user: Meteor.userId() });
        try {
            // console.dir(myConfig);
            if (!myConfig) {
                // console.log("config not found, setting to light mode.");
                $("#darkMode").prop('checked', false);
            } else {
                // console.log("My Pref: " + myConfig.darkMode);
                if (myConfig.darkMode == 'light') {
                    $("#darkMode").prop('checked', false);
                } else {
                    // console.log("should be checked.")
                    $("#darkMode").prop('checked', true);
                }
            }
        } catch(error) {
            console.log("    ERROR getting dark theme for setting swtich: " + error);
        }
        
    }
    getConfig();
});

Template.userConfig.helpers({

});

Template.userConfig.events({
    'click #darkMode' (event) {
        let darkModePref = $("#darkMode").prop('checked')
        if (darkModePref == true) {
            let mode = 'dark';
            setDarkMode(mode);
        } else {
            let mode = 'light';
            setDarkMode(mode);
        }
    },
});

const setDarkMode = async(mode) => {
    let result = await Meteor.callAsync('update.darkModePref', mode);
    if (!result) {
        console.log("  - Did not receive back a 'result' from the update.");
    } else {
        showSnackbar("Dark Mode Preference Set to " + mode, "green");
    }
}