Check if .map.originalPositionFor is a function before executing

marionebl · marionebl · commit 14bb8947539a · 2018-12-24T11:30:20.000+01:00
diff --git a/source-map-support.js b/source-map-support.js
@@ -210,7 +210,7 @@ function mapSourcePosition(position) {
   }
 
   // Resolve the source URL relative to the URL of the source map
-  if (sourceMap && sourceMap.map) {
+  if (sourceMap && sourceMap.map && typeof sourceMap.map.originalPositionFor === 'function') {
     var originalPosition = sourceMap.map.originalPositionFor(position);
 
     // Only return the original position if a matching line was found. If no

Original file line number	Diff line number	Diff line change
`@@ -210,7 +210,7 @@ function mapSourcePosition(position) {`
`210`	`210`	`}`
`211`	`211`
`212`	`212`	`// Resolve the source URL relative to the URL of the source map`
`213`		`- if (sourceMap && sourceMap.map) {`
	`213`	`+ if (sourceMap && sourceMap.map && typeof sourceMap.map.originalPositionFor === 'function') {`
`214`	`214`	`var originalPosition = sourceMap.map.originalPositionFor(position);`
`215`	`215`
`216`	`216`	`// Only return the original position if a matching line was found. If no`