SyntaxError: Unexpected token ... with v4+

Library Affected: workbox-webpack-plugin v4.3.1

Browser & Platform:

• npm v5.3.0
• node v8.0.0
• webpack v4.32.0
• webpack-cli v3.3.2

Issue or Feature Request Description: Im getting the following error when I run webpack (dev and prod) with the version 4.3.1.

options = { prototype: true, ...options };
                                 ^^^
SyntaxError: Unexpected token ...

After a downgrade to workbox-webpack-plugin v3.6.3 it works as expected. Is this a known issue?

[nico-martin]

Ok, that’s strange. Node v8.0.0 throws the SyntaxError: Unexpected token ... Error, but Node v8.10.0 seems to work. I switched multiple times to make sure that’s the problem.

Then I tried your experiment > options = { prototype: true, ...options } and that works with Node 8.10.0 AND Node 8.0.0. So it’s not the spread syntax (that works with both) but something else.

In the end I’m fine with 8.10.0. Thank for your help!

[jeffposnick]

Hmmm… you mention that you’re using node v8.0.0. Can you confirm that you’re actually on that version, and not something earlier?

As per https://node.green/#ES2015-syntax-spread-syntax-for-iterable-objects, that syntax should be supported going back to node v5.12.0.

I just tried the following experiment, and it worked fine:

$ node -v
v8.16.0

$ node
> options = {1: 2}
{ '1': 2 }
> options = { prototype: true, ...options }
{ '1': 2, prototype: true }