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Q1 2021 JavaScript Testing Libraries and Frameworks Report

2020-04-21 Update: Added Security information from Snyk. Made ThoughtWorks Technology Radar values clickable.

2020-04-20 Update: I’ve published reports for other categories as well and recommend checking them out: Frontend Frameworks, State Management Libraries, Build Tools and Module Bundlers, Static Sites Generators (JAMStack), and End-to-End Testing Frameworks.

Intro

This is a third report in the series “Q1 2021 State Of JavaScript Libraries and Tools”. The previous reports were dedicated to Frontend Frameworks and State Management Libraries. The current report covers unit testing frameworks and libraries and provides insights into how the libraries performed in Q1 2021. Multiple data sources and metrics are used to provide a complete and unbiased picture.

I used Moiva to collect all the interesting data and presented it in a table as well as in charts.

I’m going to prepare a few more similar reports dedicated to other categories - CSS Frameworks, End-to-End Testing Libraries, Node.js frameworks, Build Tools and Bundlers, and Static Site Generators. Hence, stay tuned!

Data Sources

Data for the report came from:

Metrics

Awards

Report

Hint: scroll horizontally to see values for all the libraries.

Each library has two links - Moiva and GitHub links. Use Moiva link to see more data about a particular library, to see historical data and trends.

Criteria
Stars
35K
19K
20K
15K
5.5K
3.9K
7.2K
8.5K
11K
2.5K
2.4K
4.2K
19K
14K
New Stars
1.2K
313
351
110
42
22
115
167
108
107
214
103
233
766
New Stars, %
3.5%
1.7%
1.8%
0.7%
0.8%
0.6%
1.6%
2%
1%
4.5%
10%
2.5%
1.2%
5.7%
Monthly
45M
905K
21M
15M
2.6M
806K
17M
14M
8.7M
18M
12M
154K
10M
14M
Monthly % (incr.)
13%
12%
9%
9%
7%
32%
9%
17%
10%
20%
28%
140%
7%
27%
Search Interest, %
30%
-
5%
9%
-
-
-
3%
-
-
-
19%
-
-
Developer Usage, %
68.3%
7.8%
52.7%
42%
-
-
-
-
-
-
-
-
-
26.4%
Tech Radar
-
-
-
-
-
-
-
-
-
-
Releases
0
1
3
2
4
2
5
3
12
10
2
0
0
4
Commits
76
39
31
17
22
26
23
58
41
22
11
58
31
10
Contributors
8
11
7
3
2
5
12
3
11
10
6
9
4
6
Dependencies
3
56
25
0
17
4
6
6
23
8
8
34
22
2
Types
BUNDLED
-
SEPARATE
-
SEPARATE
SEPARATE
SEPARATE
SEPARATE
SEPARATE
BUNDLED
SEPARATE
BUNDLED
SEPARATE
BUNDLED
Security
Age
7 years
6 years
10 years
12 years
8 years
12 years
9 years
11 years
10 years
3 years
3 years
10 years
5 years
3 years
License
MIT
MIT
MIT
MIT
MIT
MIT
MIT
BSD-3-Clause
MIT
MIT
MIT
MIT
MIT
MIT

Popularity: GitHub Stars

a bar chart showing numbers of JavaScript libraries' GitHub stars in total a bar chart showing numbers of JavaScript libraries' new stars in Q1 2021 a bar chart showing percentage of JavaScript libraries' new stars in Q1 2021 compared to the total value

Popularity: NPM Downloads

a bar chart showing numbers of JavaScript libraries monthly npm downloads in Q1 2021 a bar chart showing percentage of JavaScript libraries monthly npm downloads in Q1 2021 compared to the value in Q4 2020

Development Activity: commits, releases, and contributors

a bar chart showing numbers of JavaScript libraries commits in Q1 2021 a bar chart showing numbers of JavaScript libraries releases in Q1 2021 a bar chart showing numbers of JavaScript libraries contributors in Q1 2021


Stay tuned and don’t miss further reports!

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