How do you deal with leading/trailing line breaks in template literals?

[fregante]

This would be my main use case, but strip-indent only literally strips the indentation.

const fire = stripIndent(`
	THIS IS FINE.
	I'M OK WITH THE EVENTS UNFOLDING CURRENTLY.
`);

// => '\nTHIS IS FINE.\nI'M OK WITH THE EVENTS UNFOLDING CURRENTLY.\n'

I'm currently using this instead of strip-indent but maybe you have a better solution (or can extend strip-indent)

const fire = `
	THIS IS FINE.
	I'M OK WITH THE EVENTS UNFOLDING CURRENTLY.
`.replace(/(\n|\b)\t+/g, '$1').trim(); // Strips *all* indentation

// => 'THIS IS FINE.\nI'M OK WITH THE EVENTS UNFOLDING CURRENTLY.'

[sindresorhus]

It was such a missed opportunity how template literals were designed. In Swift, this does exactly what you want:

foo(
	"""
	Foo
	Bar
	"""
)

let foo = """
		Foo
		"""

[sindresorhus]

Back to your request, I'm willing to add an option for this. Any suggestion what it should be called?

I think the only thing missing is trimming the string before stripping indentation.

[fregante]

trim: true would be nice and short but it might sound like it will also trim any initial indentation that's not currently stripped.

trimNewLines: true is more exact

const fire = stripIndent(`
		THIS IS FINE.
	I'M OK WITH THE EVENTS UNFOLDING CURRENTLY.
`, {trimNewLines: true});

// => '\tTHIS IS FINE.\nI'M OK WITH THE EVENTS UNFOLDING CURRENTLY.'

[sindresorhus]

trimNewLines: true is more exact

Not exact enough. It doesn't trim all newlines, just the leading/trailing newlines. I guess trimLeadingTrailingNewlines is too verbose for you?

[fregante]

trimCodeStyleHelpingLeadingAndTrailingNewLines

A bit. Autocomplete cam help but there's still too much room for error/typos.

[sindresorhus]

• trimNewlinesAround
• trimSurroundingNewlines
• trimEnclosingNewlines

[fregante]

For the record, common-tags does a full trim by default (all whitespace is trimmed):

However it trims even some indentation that shouldn't be, like the first one

[papb]

Isn't this request equivalent to outdent?

[mmkal]

It was such a missed opportunity how template literals were designed. In Swift, this does exactly what you want:

foo(
	"""
	Foo
	Bar
	"""
)

let foo = """
		Foo
		"""

@sindresorhus @fregante I created a proposal to extend es6 template literals to allow for triple-backtick delimited literals that automatically strip margins: https://github.com/mmkal/proposal-multi-backtick-templates

It'd be great to get any feedback based on usage of this library on how you think things like this should be handled. My hope is for the default behaviour to be "what you want" for the majority of cases, therefore avoiding the need for runtime string formatting as much as possible.