noDuplicateObjectKeys (JSON)
Summary
Section titled “Summary”- Rule available since:
v1.0.0 - Diagnostic Category:
lint/suspicious/noDuplicateObjectKeys - This rule is recommended, meaning it is enabled by default.
- This rule doesn’t have a fix.
- The default severity of this rule is error.
- Sources:
- Same as
json/no-duplicate-keys
- Same as
How to configure
Section titled “How to configure”{ "linter": { "rules": { "suspicious": { "noDuplicateObjectKeys": "error" } } }}Description
Section titled “Description”Disallow two keys with the same name inside objects.
Examples
Section titled “Examples”Invalid
Section titled “Invalid”{ "title": "New title", "title": "Second title"}code-block.json:2:3 lint/suspicious/noDuplicateObjectKeys ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
✖ The key title was already declared.
1 │ {
> 2 │ "title": "New title",
│ ^^^^^^^
3 │ "title": "Second title"
4 │ }
ℹ This is where a duplicated key was declared again.
1 │ {
2 │ "title": "New title",
> 3 │ "title": "Second title"
│ ^^^^^^^
4 │ }
5 │
ℹ If a key is defined multiple times, only the last definition takes effect. Previous definitions are ignored.
{ "title": "New title", "secondTitle": "Second title"}Related links
Section titled “Related links”Sponsored by
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