I am hoping a Meteor guru can please review my code below and verify if I am properly using return false and event.preventDefault(), especially in the context of form submission.The reason being, the Meteor docs use this approach:// Prevent default form submitreturn false;while other tutorials use this approach:event.preventDefault(); //prevent page reloadSo I want to be sure that I am on the correct path before I proceed with the rest of my code.Basically, my code gets the value of the username input and checks if the value exists in the database:HTML<template name=registration>    <p class=message {{#if message_defined}}display_element{{/if}}>{{message}}</p>    <form id=register_form>        <input type=text name=username placeholder=username>    </form></template>JSif (Meteor.isClient) {    // This code only runs on the client    Meteor.subscribe(users);    Template.registration.helpers({        message: function () {            return Session.get(message);        },        message_defined: function () {            return Session.equals(message, undefined) ? false : true;        }    });    Template.registration.events({        submit #register_form: function (event) {            // This function is called when the registration form is submitted.            event.preventDefault(); // Correct usage?            var form_data = {                username: event.target.username.value,            };            if (!Match.test(form_data.username, String)) {                Session.set(message, username must be a string);                return false;  // Correct usage?            }             if (form_data.username.length < 6) {                Session.set(message, username must be at least 6 characters);                return false;  // Correct usage?            }            Meteor.call(check_username,form_data.username,function(error, result){                if (error) {                    Session.set(message, error);                    return false;  // Correct usage?                }                if (result) {                    Session.set(message, result);                    return false;  // Correct usage?                }            });        }    });}Meteor.methods({    check_username: function (username) {        // If user exists, return error.        var user = Meteor.users.findOne({username:username});        if (user) {            throw new Meteor.Error(username exists, That username is already in use.);        }        return username not found;    }});if (Meteor.isServer) {    Meteor.publish(users, function () {        return Meteor.users.find();  // This publishes everything - be careful!    });}
Meteor Form Submission
javascript;form;meteor