Book Image

Opa Application Development

By : Li Wenbo
Book Image

Opa Application Development

By: Li Wenbo

Overview of this book

Opa is a full-stack Open Source web development framework for JavaScript that lets you write secure and scalable web applications. It generates standard Node.js/MongoDB applications, natively supports HTML5 and CSS and automates many aspects of modern web application programming. It handles all aspects of web programming written in one consistent language and compiled to web standards.Opa Application Development is a practical,hands-on guide that provides you with a number of step-by-step exercises. It covers almost all aspects of developing a web application with Opa, which will help you take advantage of the real power of Opa, as well as building a secure, powerful web application rapidly.Opa Application Development dives into all concepts and components required to build a web application with Opa. The first half of this book shows you all of the basic building blocks that you will need to develop an Opa application, including the syntax of Opa, web development aspects, client and server communication and slicing, plugin, database, and so on. By the end of the book you will have yourself created a complete web application along with a game: Pacman!
Table of Contents (18 chapters)
Opa Application Development
About the Author
About the Reviewers

Using classes

Once we have imported Bootstrap CSS, we can use Bootstrap classes and styles. It is just the same as writing code in HTML, that is, <input class="btn btn-primary"/>. You can find the complete guide on Bootstrap's website (

Let's take button for example:

import stdlib.themes.bootstrap
function page(){
  <div style="margin:5px">
    <button class="btn btn-large">Large Button</button>
    <button class="btn">Default Button</button>
    <button class="btn btn-primary">Primary Button</button>
    <button class="btn btn-small">Small Button</button>
    <button class="btn btn-mini">Mini Button</button>
Server.start(Server.http,{title:"Opa Packt",~page})

And that's it; it is quite simple to use Bootstrap's classes in Opa, the result looks as follows: