Tutorials Page 23

• By David WalshJanuary 6, 2020

  Duplicated Argument Names

  Oftentimes we override or monkey patch functions and, in many cases, there are arguments we don't care too much about. A common practice for those arguments is using _ for argument names -- it's a generally accepted and known practice for "this isn't important".

• By David WalshJanuary 2, 2020

  Validate CSP from Command Line

  The content security policy spec has been an amazing front-end security tool to help prevent XSS and other types of attacks. I'd go as far to say that every site should implement as specific CSP as possible. If you aren't familiar with CSPs...

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• By David WalshDecember 30, 2019

  Goals For 2020

  Every new year brings about a sense of optimism that the next 365 can bring about big, positive changes in different phases of life. That's no exception for me and this blog. I did pretty well with last year's goals, so I thought I'd push...

• By David WalshDecember 5, 2019

  2019 Year in Review

  The beginning of every year starts out with all of us setting ambitious goals -- goals being personal and professional. Many of us rarely complete half of those goals, most abandoning them by the end of the year. In January of this year I...

• By David WalshNovember 26, 2019

  Mirror Android Device to Computer

  As I continue my adventure into Android development, pair programming has been a huge help in learning this new platform. When it's time to build and run the app, relying on the emulator is a fools' game -- the emulator is slow and it's hard to...

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• By David WalshNovember 25, 2019

  Image Lazy Loading

  Lazy loading images is a practice that's been popular for a decade and for good reason: images are usually the heaviest downloads on a given webpage and avoiding unloading images that are never seen saves the user bandwidth. There are plugins for lazy loading images in...

• By Tomek PoniatowiczNovember 20, 2019

  Getting Started with GraphQL

  GraphQL was developed by Facebook in 2012 to power up its mobile apps. Since open-sourcing GraphQL specification in 2015, it gained a lot of popularity and is now used by many development teams, including giants like GitHub, Twitter or Airbnb. Why so? And what exactly...

• By David WalshNovember 19, 2019

  Real-Time Google Search Results API with serpstack

  In my early web days, I was interested in scraping and collecting data based on the results of Google searches. Scraping Google was easier in those days but now Google search results are so dynamic that you can't rely on getting the same HTML or data...

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• By David WalshNovember 11, 2019

  Hello Fenix!

  Over seven years ago I made the massive career leap to Mozilla. Two years ago I realized a dream of joining the Firefox DevTools team -- it's been a rewarding adventure helping to improve the Firefox DevTools Debugger and other super helpful tools. I'm...

• By David WalshNovember 6, 2019

  JavaScript waitForTime

  I write a lot of tests for new features within Firefox DevTools. We have hundreds of "mochitests" which open the browser and perform synthetic actions like clicking, typing, and other user actions. I've previously written about waitForever which essentially halts following actions without locking the...