We really want to only use declared variables in our JavaScript code

matthiask · matthiask · commit 772db884d5c1 · 2025-07-08T22:05:41.000+02:00
diff --git a/biome.json b/biome.json
@@ -15,15 +15,17 @@
         "enabled": true,
         "rules": {
             "recommended": true,
+            "correctness": {
+                "noUndeclaredVariables": "error"
+            },
             "suspicious": {
                 "noDocumentCookie": "off"
             }
         }
     },
     "javascript": {
         "formatter": {
-            "trailingCommas": "es5",
-            "quoteStyle": "double"
+            "trailingCommas": "es5"
         }
     }
 }

Original file line number	Diff line number	Diff line change
`@@ -15,15 +15,17 @@`
`15`	`15`	`"enabled": true,`
`16`	`16`	`"rules": {`
`17`	`17`	`"recommended": true,`
	`18`	`+ "correctness": {`
	`19`	`+ "noUndeclaredVariables": "error"`
	`20`	`+ },`
`18`	`21`	`"suspicious": {`
`19`	`22`	`"noDocumentCookie": "off"`
`20`	`23`	`}`
`21`	`24`	`}`
`22`	`25`	`},`
`23`	`26`	`"javascript": {`
`24`	`27`	`"formatter": {`
`25`		`- "trailingCommas": "es5",`
`26`		`- "quoteStyle": "double"`
	`28`	`+ "trailingCommas": "es5"`
`27`	`29`	`}`
`28`	`30`	`}`
`29`	`31`	`}`