JSPM

Multiline strings in JavaScript (with Doug Crockford's String supplant)

a multi-line-ellipsis library

Multi-line template literals

Flatten and run multi-line executable shell script file.

Multi-line regex builder.

Use globs to find files and regex tokens to find text blocks inside those files

A Babel plugin that enables you to write properly indented and aligned template literals

stripMargin from Scala to JS