According to a new site making the rounds (and a repo that's currently trending!), no, you might not need jQuery. More on that shortly.
At NodeBB, we have afairly divergent team when it comes to our tech stack. Sure, we all use Node.js and Redis, but those were decisions that we agreed upon after a bit of wrangling:
Do we use MySQL (MariaDB), MongoDB, or Redis? (We decided on Redis)
Should we use so many new technologies all at once? (We decided: Yes)
Should we completely open-source the NodeBB code? (We decided: Yes)
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