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Tools for testing your code

Rankings Over Time

Retention, interest, usage, and awareness ratio rankings.

Technologies with less than 10% awareness not included. Each ratio is defined as follows:

  • Retention: would use again / (would use again + would not use again)
  • Interest: want to learn / (want to learn + not interested)
  • Usage: (would use again + would not use again) / total
  • Awareness: (total - never heard) / total

Experience Over Time

Overview of opinions on the technologies surveyed over time.
Would use again
Would not use
Interested
Not interested
Never heard

Technologies with only one year of data are not included.
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You can click on any technology name to get extra details and a more in-depth look at its related data.

Positive/Negative Split

This chart splits positive (“want to learn”, “would use again”) vs negative (“not interested”, “would not use again”) experiences on both sides of a central axis.

Bar thickness represents the number of respondents aware of a technology.

We asked members of the JavaScript community to share their “pick of the year”

My 2021 Pick: Lee Robinson

Lee has been great at shepherding and advocating for Next.js. He's helped me a ton with Next and continues to build excitement for where it's going

We asked members of the JavaScript community to share their “pick of the year”

Ben Ilegbodu

Ben Ilegbodu, Principal Frontend Engineer @ Stitch Fix

How happy are you with the state of testing tools?

Customize Data

Recommended Resources

JavaScript Testing Practices and Principles
Kent C. Dodds
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JavaScript Testing Practices and Principles

Learn the principles and best practices for writing maintainable test applications to catch errors before your product reaches the end user!
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