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A full list of JavaScript operators with examples

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The simplest and most effective way to access both realtime and historical stock, forex, cryptocurrency data, and over 100 technical indicators.

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Based on our record, Twelve Data should be more popular than JavaScript Operator Lookup. It has been mentioned 9 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | joshwcomeau.com | twelvedata.com |
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What each product offers, as listed by its team.


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Straightforward to use and powerful API to get financial data in real-time and complete historical data. Best in class Python package.
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
I chose Twelve Data for stock and crypto prices. Free tier: 800 calls per day. My math: 5 symbols × 96 fetches/day (every 15 minutes) = 480 calls. Comfortable margin. - Source: dev.to / 2 months ago
I am using TwelveData forex API for Extraction of raw data from the financial markets in JSON format. - Source: dev.to / over 1 year ago
Twelve Data provides extensive financial market coverage, making it ideal for those looking for a free API for building a stock portfolio tracker. - Source: dev.to / over 1 year ago
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