Avoid RegExp when we can use simple JS

ai · ai · commit c551632496b8 · 2026-04-07T22:19:16.000Z
diff --git a/lib/previous-map.js b/lib/previous-map.js
@@ -51,7 +51,8 @@ class PreviousMap {
       return fromBase64(text.substr(baseUriMatch[0].length))
     }
 
-    let encoding = text.match(/data:application\/json;([^,]+),/)[1]
+    let encoding = text.slice('data:application/json;'.length)
+    encoding = encoding.slice(0, encoding.indexOf(','))
     throw new Error('Unsupported source map encoding ' + encoding)
   }
 

Original file line number	Diff line number	Diff line change
`@@ -51,7 +51,8 @@ class PreviousMap {`
`51`	`51`	`return fromBase64(text.substr(baseUriMatch[0].length))`
`52`	`52`	`}`
`53`	`53`
`54`		`- let encoding = text.match(/data:application\/json;([^,]+),/)[1]`
	`54`	`+ let encoding = text.slice('data:application/json;'.length)`
	`55`	`+ encoding = encoding.slice(0, encoding.indexOf(','))`
`55`	`56`	`throw new Error('Unsupported source map encoding ' + encoding)`
`56`	`57`	`}`
`57`	`58`