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A full list of JavaScript operators with examples

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Billing platform for AI agent builders.
Which is more popular?
Based on our record, JavaScript Operator Lookup seems to be more popular. It has been mentioned 1 time since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | joshwcomeau.com | donehq.dev |
| Company | — | Startup from Germany · 1 - 9 employees |
| Listed in |
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No description of JavaScript Operator Lookup yet.
done. is a billing platform for AI agent builders. It takes signals from the product and other systems, evaluates them over time, and finalizes them into a single auditable billable outcome. As AI products move from seats and usage toward outcome-based pricing, billing needs more than raw events....
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Recommendations tracked on public social media and blogs since March 2021.


If you replace your || with ?? You should get the behaviour you are after. This is a good reference for what the operators do in js: https://joshwcomeau.com/operator-lookup. Source: about 5 years ago
Tracking DoneHQ.dev since May 2026.
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