fix: add codeContext property to types

[Julien-R44]

Hey !
Just this little addition. I need to modify this property elsewhere after creating my Youch instance

[thetutlage]

A couple of things. The codeContext doesn't feel like a right name to store "number of lines to display".

Another thing, can we just consume this property internally and only return that many number of lines? For example:

If you say new Youch({ linesToDisplay: 3 }), then the Youch JSON and HTML will only return 3 lines at the first place? We might to make modifications here https://github.com/poppinss/youch/blob/develop/src/Youch.js#L115-L118

[Julien-R44]

Yes I totally agree. I just didn't want to create a breaking change, but if you're okay with it that's cool !

I'm not sure what you want to change here though:

youch/src/Youch.js

Lines 115 to 118 in ec15f08

	start: frame.line - (frame.context.pre || []).length,
	pre: frame.context.pre.join('\n'),
	line: frame.context.line,
	post: frame.context.post.join('\n')

at this moment, the stack trace is already "cropped" by _parseError :

youch/src/Youch.js

Line 67 in ec15f08

Math.max(0, lineNumber - (this.codeContext + 1)),

( I didn't really look at how the HTML version worked so sorry if I'm saying something wrong. I'll look more into it tonight. )

[thetutlage]

Okay got it. So codeContext is already a property which is used internally. So, let's rename this property as we are making it public now.

options = {
  preLines: 2,
  postLines: 2,
}

new Youch(error, request, options)

I see that Youch API can be improved drastically. But for now introducing these two options should do it.

[thetutlage]

Looks great 👍

[thetutlage]

Released as 3.2.0