feat(linter): add typescript/prefer-string-starts-ends-with rule by camc314 · Pull Request #19448 · oxc-project/oxc

camc314 · 2026-02-16T17:16:18Z

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camc314 · 2026-02-16T17:16:37Z

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codspeed-hq · 2026-02-16T17:27:13Z

Merging this PR will not alter performance

✅ 4 untouched benchmarks
⏩ 46 skipped benchmarks¹

_{Comparing c/02-14-feat_linter_add_typescript_prefer-string-starts-ends-with_rule (2c9c1ac) with c/02-14-feat_linter_add_typescript_prefer-regexp-exec_rule (70993f1)²}

46 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩
No successful run was found on c/02-14-feat_linter_add_typescript_prefer-regexp-exec_rule (9b17d44) during the generation of this report, so 0c031e7 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩

camc314 · 2026-02-16T19:25:20Z

Merge activity

Feb 16, 7:25 PM UTC: The merge label '0-merge' was detected. This PR will be added to the Graphite merge queue once it meets the requirements.
Feb 16, 7:36 PM UTC: camc314 added this pull request to the Graphite merge queue.
Feb 16, 7:48 PM UTC: Merged by the Graphite merge queue.

Copilot

Pull request overview

This PR adds a new TypeScript ESLint rule prefer-string-starts-ends-with to the oxc linter. This rule encourages using String#startsWith() and String#endsWith() methods instead of manual string boundary checks using slice, indexOf, regex anchors, or manual indexing.

Changes:

Added rule skeleton for typescript/prefer-string-starts-ends-with with configuration support for allowSingleElementEquality option
Updated all generated enum files to include the new rule in alphabetical order
Added test fixtures demonstrating the rule's behavior with configuration options

Reviewed changes

Copilot reviewed 11 out of 13 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
`crates/oxc_linter/src/rules/typescript/prefer_string_starts_ends_with.rs`	New rule implementation skeleton with configuration structure defining `AllowSingleElementEquality` enum and config struct
`crates/oxc_linter/src/rules.rs`	Module registration for the new rule
`crates/oxc_linter/src/generated/rules_enum.rs`	Generated enum entries, ID constants, and trait implementations for the new rule
`crates/oxc_linter/src/generated/rule_runner_impls.rs`	RuleRunner implementation with reordering for alphabetical consistency
`apps/oxlint/fixtures/tsgolint_rule_options/test.ts`	Test cases for the rule with both allowed and disallowed patterns
`apps/oxlint/fixtures/tsgolint_rule_options/.oxlintrc.json`	Configuration enabling the rule with `allowSingleElementEquality: "always"`
`apps/oxlint/fixtures/tsgolint/prefer-string-starts-ends-with.ts`	Basic test fixtures showing incorrect code patterns
`apps/oxlint/fixtures/tsgolint/.oxlintrc.json`	Added rule to tsgolint test configuration
`apps/oxlint/src/snapshots/*.snap`	Updated snapshots showing expected error outputs

)

# Oxlint ### 💥 BREAKING CHANGES - 4315594 oxlint: [**BREAKING**] Deprecate `"always"` and `"as-needed"` options of the radix rule (#19408) (Sysix) - d4c7af3 linter: [**BREAKING**] Remove `allowRuleToRunWithoutStrictNullChecksIKnowWhatIAmDoing` option (#19451) (camc314) ### 🚀 Features - 82ca5c3 linter: Add typescript/dot-notation rule (#19442) (camc314) - 6db0811 linter: Implement eslint-plugin-vitest/no-importing-vitest-globals (#18694) (Said Atrahouch) - c7fe8ae linter: Implement eslint-plugin-vitest/prefer-import-in-mock (#17966) (Said Atrahouch) - 0abb39a linter: Implement eslint-vitest-jest-plugin/prefer-mock-return-shorthand (#18002) (Said Atrahouch) - 2b95537 linter: Implement `n/no-path-concat` rule (#19502) (Mikhail Baev) - 735d0e4 linter: Implement typescript/no-useless-default-assignment (#19488) (camc314) - 31c3a93 linter: Add typescript/no-unnecessary-type-parameters rule (#19450) (camc314) - c948090 linter: Add typescript/consistent-return rule (#19449) (camc314) - 9f87df0 linter: Add typescript/prefer-string-starts-ends-with rule (#19448) (camc314) - 04536be linter: Add typescript/prefer-regexp-exec rule (#19447) (camc314) - 56a7feb linter: Add typescript/prefer-readonly rule (#19446) (camc314) - a1cea63 linter: Add typescript/no-unnecessary-qualifier rule (#19445) (camc314) - e3144d2 linter: Add typescript/prefer-find rule (#19444) (camc314) - 13c7408 linter: Add typescript/prefer-readonly-parameter-types rule (#19443) (camc314) - 9b17d44 linter: Add typescript/strict-void-return rule (#19441) (camc314) - ed821b4 linter: Add typescript/consistent-type-exports rule (#19440) (camc314) ### 🐛 Bug Fixes - daad7bc linter/array-callback-return: Check `allowVoid` option (#19506) (Said Atrahouch) - 638cf94 linter: Add help text to eslint rule diagnostics (#19508) (Kyle Tse) - 79fc6d7 linter: Move no-use-before-define to eslint plugin (#19438) (camc314) - c832a9f linter: Add `onScrollEnd` and `onScrollEndCapture` to `react/no-unknown-property`. (#19536) (connorshea) - 999a0db linter: Add help text to `symbol-description` diagnostics (#19538) (Anthony Amaro) - f064482 linter: Add help text to eslint rule diagnostics (#19539) (Anthony Amaro) - fd11073 linter/react/no-unknown-property: Add missing `fetchPriority` prop (#19525) (João Pedro Schmitz) - a9bb604 linter/no-shadow: Align initializer shadow handling with typescript-eslint (#19462) (camc314) - 32e6eb9 linter: Handle typed arrays/array buffers in `prefer-spread` rule. (#19478) (connorshea) - e309f84 linter: Handle additional cases in `typescript/consistent-generic-constructors` rule. (#19477) (connorshea) - 71db91a linter/array-callback-return: Check `fromAsync`, update test cases (#19483) (Said Atrahouch) - 2a12d74 linter: Handle optional chaining in `no-array-method-this-argument` rule. (#19476) (connorshea) - f65310b linter: Handle optional chaining in `prefer-object-from-entries` rule. (#19475) (connorshea) - 840acf4 linter: Handle optional chain in `no-unnecessary-array-flat-depth` rule. (#19471) (connorshea) - 85a19e9 linter: Skip string literal imports in `consistent-assert` rule. (#19474) (connorshea) ### ⚡ Performance - 6155ac4 linter/constructor-super: Use node_id over nodes loop (#19489) (camc314) - a02496d linter/consistent-index-object-style: Resolve circular type refs semantically (#19490) (camc314) # Oxfmt ### 🚀 Features - 652c346 oxfmt/lsp: Support `untitled://` schema (#19287) (Sysix) ### 🐛 Bug Fixes - 6c61b70 oxfmt: Fix outdated `sortImports.groups` doc comments (#19513) (leaysgur) Co-authored-by: camc314 <18101008+camc314@users.noreply.github.com>

This was referenced Feb 16, 2026

feat(linter): add typescript/prefer-regexp-exec rule #19447

Merged

feat(linter): add typescript/consistent-return rule #19449

Merged

feat(linter): add typescript/no-unnecessary-type-parameters rule #19450

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github-actions bot added A-linter Area - Linter A-cli Area - CLI C-enhancement Category - New feature or request labels Feb 16, 2026

camc314 self-assigned this Feb 16, 2026

camc314 force-pushed the c/02-14-feat_linter_add_typescript_prefer-regexp-exec_rule branch from 70993f1 to d98bb2c Compare February 16, 2026 19:19

camc314 force-pushed the c/02-14-feat_linter_add_typescript_prefer-string-starts-ends-with_rule branch 2 times, most recently from 2256ba3 to f9b44a0 Compare February 16, 2026 19:21

camc314 force-pushed the c/02-14-feat_linter_add_typescript_prefer-regexp-exec_rule branch from d98bb2c to 0cc2cf1 Compare February 16, 2026 19:21

camc314 force-pushed the c/02-14-feat_linter_add_typescript_prefer-string-starts-ends-with_rule branch from f9b44a0 to 2c9c1ac Compare February 16, 2026 19:23

camc314 force-pushed the c/02-14-feat_linter_add_typescript_prefer-regexp-exec_rule branch from 0cc2cf1 to b1ceb5e Compare February 16, 2026 19:23

camc314 added the 0-merge Merge with Graphite Merge Queue label Feb 16, 2026

camc314 marked this pull request as ready for review February 16, 2026 19:25

Copilot AI review requested due to automatic review settings February 16, 2026 19:25

Copilot started reviewing on behalf of camc314 February 16, 2026 19:27 View session

camc314 force-pushed the c/02-14-feat_linter_add_typescript_prefer-string-starts-ends-with_rule branch from 2c9c1ac to 660f6f5 Compare February 16, 2026 19:30

camc314 force-pushed the c/02-14-feat_linter_add_typescript_prefer-regexp-exec_rule branch from b1ceb5e to 0293fc4 Compare February 16, 2026 19:30

Copilot AI reviewed Feb 16, 2026

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feat(linter): add typescript/prefer-string-starts-ends-with rule (#19448

9f87df0

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graphite-app bot force-pushed the c/02-14-feat_linter_add_typescript_prefer-regexp-exec_rule branch from 0293fc4 to 04536be Compare February 16, 2026 19:38

graphite-app bot force-pushed the c/02-14-feat_linter_add_typescript_prefer-string-starts-ends-with_rule branch from 660f6f5 to 9f87df0 Compare February 16, 2026 19:39

graphite-app bot removed the 0-merge Merge with Graphite Merge Queue label Feb 16, 2026

Base automatically changed from c/02-14-feat_linter_add_typescript_prefer-regexp-exec_rule to main February 16, 2026 19:46

graphite-app bot merged commit 9f87df0 into main Feb 16, 2026
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graphite-app bot deleted the c/02-14-feat_linter_add_typescript_prefer-string-starts-ends-with_rule branch February 16, 2026 19:48

Boshen mentioned this pull request Feb 19, 2026

release(apps): oxlint v1.49.0 && oxfmt v0.34.0 #19553

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feat(linter): add typescript/prefer-string-starts-ends-with rule#19448

feat(linter): add typescript/prefer-string-starts-ends-with rule#19448
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