In this video, I show you how to communicate between an extension "pop-up" and a content script with chrome's messaging API.

Next Video: https://youtu.be/vNb3P5KIxXw
Chrome Extensions playlist: https://www.youtube.com/playlist?list=PLRqwX-V7Uu6bL9VOMT65ahNEri9uqLWfS

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To buy Coding Train merchandise: https://codingtrain.storenvy.com
To Support the Processing Foundation: https://processingfoundation.org/support

Send me your questions and coding challenges!: https://github.com/CodingTrain/Rainbow-Topics

Contact:
Twitter: https://twitter.com/shiffman
The Coding Train website: http://thecodingtrain.com/

Links discussed in this video:
Programming from A to Z: http://shiffman.net/a2z/chrome-ext/
chrome.extension reference: https://developer.chrome.com/extensions

Source Code for the all Video Lessons: https://github.com/CodingTrain/Rainbow-Code

p5.js: https://p5js.org/
Processing: https://processing.org

For an Introduction to Programming: https://www.youtube.com/watch?v=8j0UDiN7my4&index=1&list=PLRqwX-V7Uu6Zy51Q-x9tMWIv9cueOFTFA
For More Coding Challenges: https://www.youtube.com/playlist?list=PLRqwX-V7Uu6ZiZxtDDRCi6uhfTH4FilpH