Skip to Content
JavaScript by Example
book

JavaScript by Example

by Dani Akash S
August 2017
Beginner
298 pages
7h 4m
English
Packt Publishing
Content preview from JavaScript by Example

Source maps in production

Source maps provide us with an easy way to debug our compiled code. Browsers don't load source maps until the development tool is opened. Hence, performance-wise source maps don't cause any harm. However, if you need the original source code to be protected, then removing source maps is a good idea. You can also use private source maps by setting sourceMappingURL at the end of each bundled file to a restricted URL that can be used only by a trusted source (for example, source maps can be accessed only by developers within the company's domain):

//# sourceMappingURL: http://protected.domain/dist/general.js.map

The complete Webpack configuration file with all the earlier mentioned optimizations will look as: https://goo.gl/UDuUBu ...

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.

Read now

Unlock full access

More than 5,000 organizations count on O’Reilly

AirBnbBlueOriginElectronic ArtsHomeDepotNasdaqRakutenTata Consultancy Services

QuotationMarkO’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.
Julian F.
Head of Cybersecurity
QuotationMarkI wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.
Addison B.
Field Engineer
QuotationMarkI’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.
Amir M.
Data Platform Tech Lead
QuotationMarkI'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
Mark W.
Embedded Software Engineer

You might also like

JavaScript by Example

JavaScript by Example

Ellie Quigley

Publisher Resources

ISBN: 9781788293969