Nguyen Minh Tuan tuannguyenminh2086

The Revealing Module Pattern in Javascript

Zach Caceres

Javascript does not have the typical 'private' and 'public' specifiers of more traditional object oriented languages like C# or Java. However, you can achieve the same effect through the clever application of Javascript's function-level scoping. The Revealing Module pattern is a design pattern for Javascript applications that elegantly solves this problem.

The central principle of the Revealing Module pattern is that all functionality and variables should be hidden unless deliberately exposed.

Let's imagine we have a music application where a musicPlayer.js file handles much of our user's experience. We need to access some methods, but shouldn't be able to mess with other methods or variables.

Using Function Scope to Create Public and Private Methods

Recently when refactoring a Vue 1.0 application, I utilized ES6 arrow functions to clean up the code and make things a bit more consistent before updating to Vue 2.0. Along the way I made a few mistakes and wanted to share the lessons I learned as well as offer a few conventions that I will be using in my Vue applications moving forward.

The best way to explain this is with an example so lets start there. I'm going to throw a rather large block of code at you here, but stick with me and we will move through it a piece at a time.

<script>

// require vue-resource...

new Vue({

	# --------------------------------------------------------------
	# Customer Support Ticket Classification System
	# --------------------------------------------------------------

	import instructor
	from pydantic import BaseModel, Field
	from openai import OpenAI
	from enum import Enum
	from typing import List

	//Woocommerce Checkout JS events
	$( document.body ).trigger( 'init_checkout' );
	$( document.body ).trigger( 'payment_method_selected' );
	$( document.body ).trigger( 'update_checkout' );
	$( document.body ).trigger( 'updated_checkout' );
	$( document.body ).trigger( 'checkout_error' );

	//Woocommerce cart page JS events
	$( document.body ).trigger( 'wc_cart_emptied' );
	$( document.body ).trigger( 'update_checkout' );

	<template>
	<div class="wrapper">
	<p>
	Timeline test 2
	</p>
	<div id="visualization"></div>
	</div>
	</template>

	<script>

	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="utf-8" />
	<title>Ionic App</title>

	<base href="/" />

	<meta
	name="viewport"

	<?php
	/**
	* Checkout Form
	*
	* This template can be overridden by copying it to yourtheme/woocommerce/checkout/form-checkout.php.
	*
	* HOWEVER, on occasion WooCommerce will need to update template files and you
	* (the theme developer) will need to copy the new files to your theme to
	* maintain compatibility. We try to do this as little as possible, but it does
	* happen. When this occurs the version of the template file will be bumped and

	/*
	* Handling Errors using async/await
	* Has to be used inside an async function
	*/
	try {
	const response = await axios.get('https://your.site/api/v1/bla/ble/bli');
	// Success 🎉
	console.log(response);
	} catch (error) {
	// Error 😨

	<?php
	/**
	* Custom Events Template
	* This file is the basic wrapper template for all the views if 'Default Events Template'
	* is selected in Events -> Settings -> Template -> Events Template.
	*
	* Override this template in your own theme by placing this file at [your-theme]/tribe-events/default-template.php
	*
	* @package TribeEventsCalendar
	*

	// Source: https://gist.github.com/luetkemj/2023628
	// Xem hướng dẫn WP_Query toàn tập: http://goo.gl/kRpzTz
	<?php
	$args = array(

	//////Author Parameters - Tham số lấy bài viết theo tác giả
	//http://codex.wordpress.org/Class_Reference/WP_Query#Author_Parameters
	'author' => '1,2,3,', //(int) - Các ID tác giả cần lấy bài viết (thêm dấu - vào để loại trừ tác giả, ví dụ: -14, -20)
	'author_name' => 'luetkemj', //(string) - Lấy bài viết dựa theo tên nick name của tác giả
	'author__in' => array( 2, 6 ), //(array) - Lấy bài dựa theo ID của tác giả