syscall/js: improve panic messages

This commit adds the actual type to the panic message when calling
a method of Value on a Value with a bad type. It also adds better
panic messages to Value.Invoke and Value.Call.

Change-Id: Ic4b3aa29d3bef8e357be40cd07664ad602ffab12
Reviewed-on: https://go-review.googlesource.com/122376
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2 files changed
tree: b851b541de486f9acf2ea6ac5b657ab2fa295b09
  1. .github/
  2. api/
  3. doc/
  4. lib/
  5. misc/
  6. src/
  7. test/
  8. .gitattributes
  9. .gitignore
  10. AUTHORS
  11. CONTRIBUTING.md
  12. CONTRIBUTORS
  13. favicon.ico
  14. LICENSE
  15. PATENTS
  16. README.md
  17. robots.txt
README.md

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