Before Google Chrome update I saw source map files at Chrome Devtools on Network tab. Now, after update to version 43.0.2357.134 m I don't see them.
Maybe my code is wrong? Or it's done intentionally to hide those source maps?
Now (1/10/2016) it looks like there is a way to get this information by searching for "map" in chrome://net-internals/#events
This was a side-effect of fixing bug 362913 which was a feature request being tracked in issue 465032.
If you have a need for seeing the map files then please file a new issue for it and explain the use-case for why you need it.
来源：https://stackoverflow.com/questions/31524221/source-map-is-not-visible-at-chrome-network-tab