iOS await + yield giving syntax error

1

This as a cell fails on iOS:
{
await new Promise(resolve => setTimeout(resolve, 100));
yield ‘done’;
}

I made a simple notebook to repro:

On iOS I see “Syntax Error: Unexpected token ‘*’. Expected an opening ‘(’ before a async function’s parameter list”. Note that if I remove the await line or the yield line, the error goes away.

On desktop chrome, it works fine and yields ‘done’ after 100ms.

Have you seen this before?

2

Sadly, async generators are not yet supported in Safari. However, you can often achieve the same effect in a (non-async) generator by yielding a promise, since Observable automatically waits for the promise to resolve before pulling the next value from the generator.