Add contains, startsWith, endsWith string query operators

[Copilot]

• Add contains, startsWith, endsWith to WHERE_OPERATORS in where-operators.ts
• Handle the new operators in matches-where.ts (case-insensitive, ignore non-string fields)
• Add tests to parse-where.test.ts for parsing
• Add tests to matches-where.test.ts for matching behavior (43 tests passing)
• Update README Conditions section to document the three new operators

Original prompt

Add query operators for partial string matching using the colon syntax in typicode/json-server:

• Support field:contains=..., field:startsWith=..., and field:endsWith=... in query params.
• Operators are camelCase exactly as above.
• Matching should be case-insensitive by default.
• Ignore non-string field values (do not match on numbers, booleans, objects, arrays, etc.).

Add minimal tests covering:

• Each operator on a string field
• Case-insensitive behavior
• Non-string fields are ignored (no match)

Update implementation in the existing query parsing/filtering pipeline (do not add a new syntax), and keep behavior consistent with current filtering.

This pull request was created from Copilot chat.

---

🔒 GitHub Advanced Security automatically protects Copilot coding agent pull requests. You can protect all pull requests by enabling Advanced Security for your repositories. Learn more about Advanced Security.

[typicode]

@copilot update README

[Copilot]

@copilot update README

Done in c9e2f5c. Added contains, startsWith, and endsWith to the Conditions section in the README, including descriptions and examples for each.

[typicode]

@copilot in src/matches-where.test.ts add 1 test per operator (contains, startsWith, endsWith) where the value is a number.

[Copilot]

@copilot in src/matches-where.test.ts add 1 test per operator (contains, startsWith, endsWith) where the value is a number.

Added in f36465d — one test per operator where the search value is a number ({ c: { contains: 1 } }, { c: { startsWith: 1 } }, { c: { endsWith: 1 } }), all returning false since 'x' doesn't contain/start/end with '1'.