3 ways to generate multiline strings in JavaScript

multiline-strings.js

// 16 June 2019
// 3 ways to generate multiline strings in JavaScript

// see also string templates
// https://gist.github.com/dfkaye/088f0d5cc76d387c1357
// and "stateless" components
// https://gist.github.com/dfkaye/2d5cbd87f6bbf4976762


// 1. template literals (es6)

var es6literal = `
This is a multi-
line template literal.
`;

console.log(es6literal.trim());
/*
This is a multi-
line template literal.
*/


// 2. EOL backslash (es3)

var es3string = "\
This is a multi-\
line string\n\
with a newline char.\
";

console.log(es3string.trim());
/*
This is a multi-line string
with a newline char.
*/


// 3. function toString with a regex (es3)

var heredoc = function() {/*!
This comment is a multi-
line string inside
of a function.
!*/}

console.log(String(heredoc).match(/(?:\/\*\!)([^\/]+)(?:\!\*\/)/)[1].trim());
/*
This comment is a multi-
line string inside
of a function.
*/