CodeFactor.io
JSLint
Codacy
ESLint
Coala
textlint
Prettier
Online Javascript Validator validates javascript code and find errors and warnings that can be fixed. See real time validation of your javascript code as you type.

PyLint
PyFlakes
PEP8
ruff
VS Code
Codacy
Coala
Static type checker for Python. Contribute to microsoft/pyright development by creating an account on GitHub.

Which is more popular?
Based on our record, Pyright should be more popular than Javascript Validator. It has been mentioned 17 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | beautifytools.com | github.com |
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What each product offers, as listed by its team.

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Vim setup for Python programmers: conquer of completion (coc) and pyright
How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using Javascript Validator and Pyright. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.

Try pasting your code into a validator to see if you don't have a typo somewhere: https://beautifytools.com/javascript-validator.php. Source: over 4 years ago
So everything works fine the way I see it and that error only comes up after a few clicks. Since I'm not a js wizard I did put your script code into a javascript validator and it looks like you're missing a couple of semi colons here and... Source: almost 5 years ago
Now that I have started my Python project devto-followers2md, I have recently started checking my code with Ruff, a fast Rust-based Python linter and code formatter. I also started using pyright, (yes, I know it is very ironic, it is... - Source: dev.to / 4 months ago
Is used with the type checkers such as mypy, pyright, pyre-check, pytype, etc. - Source: dev.to / 11 months ago
Mypy (and pyright occasionally) as a type checker,. - Source: dev.to / over 1 year ago
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JSLint is a JavaScript program that looks for problems in JavaScript programs.
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A simple program which checks Python source files for errors.
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Automatically reviews code style, security, duplication, complexity, and coverage on every change while tracking code quality throughout your sprints.
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pep8 is a tool to check your Python code against some of the style conventions in PEP 8.
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