Progressive Web Apps are the new hotness with Google pressing hard to make them the de facto choice for building mobile applications. Support for PWA’s is quite good in Chrome, FireFox, and Edge but what's to be done about Safari and iOS where many of the key API's are not supported. Six months ago I would have told you to wrap your PWA in an Apache Cordova/PhoneGap container to polyfill the missing functionality. Now Apple has moved aggressively to support PWA’s in desktop Safari and iOS 11.3 but there are still some quirks. In this talk, I'll show you how to create a PWA that runs on the web, Android, and iOS from a single code base. Take advantage of some new tools to easily deploy and test your PWA. EVENT: Node+JS Interactive 2018 SPEAKER: Simon MacDonald, Adobe PERMISSIONS: The Linux Foundation provided Coding Tech with the permission to republish this video. CREDITS: NodeJS YouTube channel: https://www.youtube.com/channel/UCQPYJluYC_sn_Qz_XE-YbTQ https://www.youtube.com/watch?v=2kv9tH_IYtQ

Transactions on a blockchain have to be signed with a private key. This makes sure that people can only spend coins if they have the private key of their wallet. In this video we will refactor our Javascript blockchain so that it will only accept signed transactions. We'll use the secp256k1 elliptic curve to generate a keypair. The same algorithm used in Bitcoin. But you can use other algorithms as well. 🤲 Source code
Available on GitHub:
https://github.com/SavjeeTutorials/SavjeeCoin 💰 Buy Bitcoin, Ethereum, Litecoin, ..
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Puppeteer is a Node api for Headless Chrome — which allows you to run Chrome without a GUI. Puppeteer is great for automating form submissions or screen scraping. This talk will walk you through the basics of Puppeteer and show several useful examples. EVENT: OKC.js Techlahoma event 2018 SPEAKER: Carmen Bourlon PERMISSIONS: Techlahoma events Organizer provided Coding Tech with the permission to republish this video. https://www.youtube.com/watch?v=ARt3zDHSsd4