SyntaxError: Unexpected keyword 'const'.

[Tane Morgan]

Hi there,

I'm using Sketch 49 (51002) on El Capitan, and I'm getting the following error when trying to open this plugin:

8/03/18 11:41:53.415 AM Show DevTools (Sketch)[88136]: SyntaxError: Unexpected keyword 'const'. Const declarations are not supported in strict mode..
Plugin “show-debugger”, line 1:

I'm a bit of a novice with how Sketch plugins are set up... is this an issue with JavaScriptCore? My Safari version is at latest (11.0.3) and my system Node version is at 9.7.1.

I guess I could fork the repo and try to build a version of the plugin that transpiles things... but don't want to go there unless I really have to.

Any ideas?

[Mathieu Dutour]

Yeah, it's an issue with JavaScriptCore on El Capitan. The issue with transpiling is that it's going to use arguments and that breaks when running functions across the bridge

[Tane Morgan]

Thanks @mathieudutour. So where does that leave us - is the best option to fork the repo and, say, flip the const declarations back to var? I'm wondering who else may be hitting this issue, in which case a fork might be useful to others as well.

[Mathieu Dutour]

Well that’s not the only issue, there are a bunch more, look at the darknoon/cocoascript-class repo

[Tane Morgan]

Ok thanks for pointing me in that direction, can see what the issues are now.

[Leonard Pauli]

Managed to get the window to open after manually transpiling in sketch-dev-tools/dev-tools.sketchplugin/Contents/Sketch/show-debugger.js:

• , ...x] to ].concat(x)
• (x) => { to function (x) {
• (x) => y to function (x) {return y}
• return func.apply(this, [x, y, ...arguments]) with:

// relevant bundled non-transpiled file: ./node_modules/cocoascript-class/lib/runtime.js
var n = arguments.length
    return n==0? func(structPtr, selector)
      : n==1? func(structPtr, selector, arguments[0])
      : n==2? func(structPtr, selector, arguments[0], arguments[1])
      : n==3? func(structPtr, selector, arguments[0], arguments[1], arguments[2])
      : n==4? func(structPtr, selector, arguments[0], arguments[1], arguments[2], arguments[3])
      : n==5? func(structPtr, selector, arguments[0], arguments[1], arguments[2], arguments[3], arguments[4]) // etc
      : log('SuperCall too many args ' + n)

Looks neat!

But yeah, there is some issue as noted before, doesn't finish loading and no logs (skpm log -f -n 10). Would be great to have some os check or big warning pointing to this issue to avoid more wasted time :) Would love to use this!

Also. cmd-alt dragging the plugin to the plugins folder, alt. ln -s "$(pwd)/dev-tools.sketchplugin" ~/"Library/Application Support/com.bohemiancoding.sketch3/Plugins"/ makes reloading much faster. Also defaults write ~/Library/Preferences/com.bohemiancoding.sketch3.plist AlwaysReloadScript -bool YES doesn't seem to work for me, still have to restart Sketch between edits.

Linked issue: darknoon/cocoascript-class#2

---

Update: Actions tab seems to be working!

[Mathieu Dutour]

The logs only work on Sketch 50+ and the hot reloading doesn't work because it's a long running script.

I think I'll close this issue as a "won't fix"

[Leonard Pauli]

Solved it!

Until the PR to @darknoon is merged, a workaround for those not running the latest OSX...:

• git clone [e-mail]:skpm/sketch-dev-tools.git
• git clone [e-mail]:LeonardPauli/cocoascript-class.git
• (cd cocoascript-class && npm i && npm link)
• cd sketch-dev-tools && npm i && npm link cocoascript-class
• npm run build + install the plugin, or just open sketch + npm run start

Alternatively, just install pre-built: dev-tools-with-older-jsc-support.sketchplugin.zip (as of 3 June, v0.6.0)

Looks like everything is working somewhat properly! (network tab says coming soon) Thanks for the plugin, looking forward to fix mine now XD

Ps. I'm running v50.2; long running script - thx, should have though of that!; What is the workflow then?... nvm, found skpm/skpm#142