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neelance and Richard Musiol syscall/js: replace TypedArrayOf with CopyBytesToGo/CopyBytesToJS
The typed arrays returned by TypedArrayOf were backed by WebAssembly
memory. They became invalid each time we grow the WebAssembly memory.
This made them very error prone and hard to use correctly.

This change removes TypedArrayOf completely and instead introduces
CopyBytesToGo and CopyBytesToJS for copying bytes between a byte
slice and an Uint8Array. This breaking change is still allowed for
the syscall/js package.

Fixes #31980.
Fixes #31812.

Change-Id: I14c76fdd60b48dd517c1593972a56d04965cb272
Run-TryBot: Richard Musiol <>
TryBot-Result: Gobot Gobot <>
Reviewed-by: Cherry Zhang <>
Reviewed-by: Brad Fitzpatrick <>
Latest commit c468ad0 May 16, 2019

The Go Programming Language

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