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A full list of JavaScript operators with examples

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Free schema markup validator for JSON-LD and Schema.org structured data. Validate schema markup for Google Rich Results compliance. Online schema validator tool.

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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 | schemavalidator.com |
| Pricing | — | |
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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 Schema Validator since Nov 2025.
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