fix: reset regex lastIndex to prevent keyword matching failures

[jaffrepaul]

DESCRIBE YOUR PR

This fixes a nuanced regex issue that was creating cases where keywords were converting correctly in some places but not in other instances on the same page.

The regex here uses a global flag which is stateful and each regex .test() call inherits lastIndex from the previous call. If lastIndex > string.length, the test fails and doesn't convert the keyword. This small update makes sure every .test() call starts fresh with lastIndex = 0 so every string is searched from the beginning.

PROD: https://docs.sentry.io/product/drains/integration/vercel/
PREVIEW: https://sentry-docs-git-stale-keyword-fix.sentry.dev/product/drains/integration/vercel/

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PRE-MERGE CHECKLIST

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• Checked Vercel preview for correctness, including links
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• PR was reviewed and approved by a member of the Sentry docs team

LEGAL BOILERPLATE

Look, I get it. The entity doing business as "Sentry" was incorporated in the State of Delaware in 2015 as Functional Software, Inc. and is gonna need some rights from me in order to utilize my contributions in this here PR. So here's the deal: I retain all rights, title and interest in and to my contributions, and by keeping this boilerplate intact I confirm that Sentry can use, modify, copy, and redistribute my contributions, under Sentry's choice of terms.

EXTRA RESOURCES

• Sentry Docs contributor guide

[vercel]

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Project	Deployment	Preview	Comments	Updated (UTC)
develop-docs	Ready	Preview	Comment	Nov 19, 2025 11:20pm
sentry-docs	Ready	Preview	Comment	Nov 19, 2025 11:20pm

[codecov]

Bundle Report

Changes will increase total bundle size by 183.33kB (0.79%) ⬆️. This is within the configured threshold ✅

Detailed changes

Bundle name	Size	Change
sentry-docs-client-array-push	10.17MB	22 bytes (0.0%) ⬆️
sentry-docs-server-cjs*	12.81MB	183.31kB (1.45%) ⬆️

ℹ️ *Bundle size includes cached data from a previous commit

Affected Assets, Files, and Routes:

view changes for bundle: sentry-docs-client-array-push

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
static/chunks/pages/_app-*.js	-3 bytes	882.71kB	-0.0%
static/chunks/8321-*.js	-3 bytes	425.87kB	-0.0%
static/chunks/app/[[...path]]/page-*.js	28 bytes	95.95kB	0.03%
static/iWyPniwUCB1yQ9n7Ty7_8/_buildManifest.js (New)	684 bytes	684 bytes	100.0% 🚀
static/iWyPniwUCB1yQ9n7Ty7_8/_ssgManifest.js (New)	77 bytes	77 bytes	100.0% 🚀
static/irNisoLwdOGnzKmxF2aki/_buildManifest.js (Deleted)	-684 bytes	0 bytes	-100.0% 🗑️
static/irNisoLwdOGnzKmxF2aki/_ssgManifest.js (Deleted)	-77 bytes	0 bytes	-100.0% 🗑️

view changes for bundle: sentry-docs-server-cjs

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
1729.js	-3 bytes	1.74MB	-0.0%
../instrumentation.js	-3 bytes	1.07MB	-0.0%
9523.js	-3 bytes	1.04MB	-0.0%
../app/[[...path]]/page.js.nft.json	61.1kB	831.97kB	7.93% ⚠️
../app/platform-redirect/page.js.nft.json	61.1kB	831.89kB	7.93% ⚠️
../app/sitemap.xml/route.js.nft.json	61.1kB	829.12kB	7.95% ⚠️
../app/[[...path]]/page.js	30 bytes	619.97kB	0.0%

App Routes Affected:

App Route	Size Change	Total Size	Change (%)
/[[...path]]	30 bytes	3.37MB	0.0%

[sergical]

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