JSFoo is in its ninth edition this year. Talks at JSFoo 2019 will cover the following topics:
- Component architecture -- how different web components have been stitched together to build apps; outcomes on UI and performance as a result of architecture choices
- Deployment practices for front-end and how Kubernetes and CI/CD fall into this picture
- Accessibility
- Developer experience (DX)
- Functional programming paradigms: ReasonML and ClojureScript
- Privacy and Content Security Policy (CSP)
- New developments such as SvelteJS
Speakers from Razorpay, CloudCherry, Myntra, Innovaccer, GitLab, Microsoft, Atlassian and Gramener will share their work and learnings on these topics.
Who should attend JSFoo: #
JSFoo is a conference for practitioners, by practitioners. JSFoo 2019 is a conference for:
- Front-end engineers
- Senior software developers
- Team leaders and engineering managers
- Fullstack developers
- InfoSec professionals
##JSFoo 2019 details:
Dates: 27 and 28 September
Venue: NIMHANS Convention Centre, Bangalore
##JSFoo workshops:
The following workshops have been curated for before and after the conference:
##Contact details:
For inquiries about conference tickets, workshop tickets and any other details, call JSFoo on 7676332020 or email info@hasgeek.com
#Sponsors:
Click here for the Sponsorship Deck.
Email sales@hasgeek.com for bulk ticket purchases, and sponsoring JSFoo 2019.
JSFoo 2019 sponsors: #
#Platinum Sponsor
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#Gold Sponsor
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#Exhibition Sponsor
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#Bronze Sponsor
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#Community Sponsor
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Contact #
For tickets and sponsorships, contact info@hasgeek.com or call +91-7676332020. For queries about proposing talks, write to jsfoo.editorial@hasgeek.com
US
Upendra Dev Singh
@uds
Building a High Performance Mobile-First Web App | A case study of Jabong PWA
Submitted Jun 1, 2019
Duration:
40 mins full talk
Section:
Full talk (40 mins)
Technical level:
Advanced
Modern web applications are JavaScript heavy. JavaScript ecosystem is such that you get a lot of tools, libraries, and the framework for free. The cost of using a framework could be very high. During this talk, I will take the audience through the Jabong PWA implementation using preact. I will talk about how we applied the domain-driven design approach to make some important architecture decisions upfront to choose our technology stack e.g preact, preact-router, in-house state management container (similar to redux). I will also talk about performance optimizations techniques we have used to achieve a perfect Lighthouse Score “100”. WPT report is available here https://webpagetest.org/lighthouse.php?test=190527_5T_a65fb33950a68ca88897b4ea3ceb66a5
Outline #
This talk will cover how we have reduced the JavaScript footprint drastically using preact and related libraries. Also, we will talk about the code-splitting in preact app that allowed us to render a fully interactive page with just 18kb of JavaScript less than react size.
These are some of the latest web and browser technologies we have implemented.
ZERO render blocking requests
Intersection Observer
Lazy load images using Intersection Observer
Replace onScroll with Intersection Observer
Preload critical requests
Hybrid rendering
RequestAnimationFrame for visual changes
Passive Listeners
Precache future routes with serviceworker
Route-based & Component-based Code Splitting
HTTP/2 - Server push and multiplexing
Preconnect third party domains
Maximize GPU usage
Using the latest image formats for different browsers Progressive jpeg and WebP
Network API & dpr-based Image delivery
Web Font optimization
Speaker bio #
Director of Engineering at Myntra Jabong
“Using technology to build product that helps customers to make better buying decisions”
Links #
Slides #
https://docs.google.com/presentation/d/1COVwZyc9VZdezI05xCUh-kP8qRtvR-VXKR33siZ49hU/
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