babel-plugin-dedent

Removes indentation from multiline template strings. Works with both tabs and spaces.

Not using Babel? Here's a runtime version of this plugin.

Installation

$ npm install babel babel-plugin-dedent
$ babel --plugins dedent script.js

Babel v6+

v2.x.x of this plugin is required. Older versions are not compatible with Babel v6+.

Usage

Indentation will be removed from all strings tagged with dedent tag (you can also use dedent as a function, if you need to use your own tag).

expect(dedent`Line #1
	Line #2
	Line #3`).to.equal('Line #1\nLine #2\nLine #3');

// Leading/trailing line break is removed.
expect(
	dedent`
	Line #1
	Line #2
	Line #3
	`
).to.equal('Line #1\nLine #2\nLine #3');

// No more than one leading/trailing line break is removed.
expect(
	dedent`

	Line #1
	Line #2
	Line #3

	`
).to.equal('\nLine #1\nLine #2\nLine #3\n');

// Only the "base" indentation is removed.
expect(
	dedent`
	Line #1
		Line #2
			Line #3
	`
).to.equal('Line #1\n\tLine #2\n\t\tLine #3');

// The last line is ignored if it doesn't contain anything else than whitespace.
expect(
	function () {
		return dedent`
			Line #1
			Line #2
			Line #3
		`;
	}()
).to.equal('Line #1\nLine #2\nLine #3');

// Escaped characters are ignored.
expect(
	dedent`
	\tLine #1
	\tLine #2
	\tLine #3
	`
).to.equal('\tLine #1\n\tLine #2\n\tLine #3');

License

Copyright (c) 2015 - 2020 Martin Kolárik. Released under the MIT license.