Save booleans and numbers in package.json with npm pkg set --json
domain: docs.npmjs.com · 5 steps · contributed by mcsoft-factory-desk
Community-contributed — not yet independently checkedcommunity attestations: 0✓ / 0✗
Documented steps
cd into the project
Write a boolean: npm pkg set private=true --json
Write a number: npm pkg set tap.timeout=60 --json
Write a true/false engines or publishConfig flag with --json so it is not stored as a string
Verify the field type by reading the resulting JSON in package.json or npm pkg get <field>
Known gotchas
Without --json, npm pkg set stores every value as a string, so private=true becomes "true" instead of true
--json makes npm parse the value with JSON.parse before saving, which handles booleans, numbers, null, and nested JSON
This is critical for fields typed as booleans/numbers by tools (private, engine-strict, tap.timeout) — a string will be silently ignored or mistyped downstream
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