heretag
v1.1.8
Published
Heredoc implementation using template literals
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heretag v1.1.8
A heredoc implementation using template literals.
Example
Consider phlebas.js
:
// phlebas.js
const here = require('heretag')
const phlebas = here(`
IV. Death by Water
Phlebas the Phoenician, a fortnight dead,
Forgot the cry of gulls, and the deep sea swell
And the profit and loss.
A current under sea
Picked his bones in whispers. As he rose and fell
He passed the stages of his age and youth
Entering the whirlpool.
Gentile or Jew
O you who turn the wheel and look to windward,
Consider Phlebas, who was once handsome and tall as you.
`)
console.log(phlebas)
Running this script will give the following result:
nn@Arkady:~$ node phlebas.js
IV. Death by Water
Phlebas the Phoenician, a fortnight dead,
Forgot the cry of gulls, and the deep sea swell
And the profit and loss.
A current under sea
Picked his bones in whispers. As he rose and fell
He passed the stages of his age and youth
Entering the whirlpool.
Gentile or Jew
O you who turn the wheel and look to windward,
Consider Phlebas, who was once handsome and tall as you.
nn@Arkady:~$ ▮
Preserving Some Indentation
Suppose you want to preserve some level of indentation. To do so, specify a
number as either the first or second argument to here
. The given number of
spaces will be preserved:
// preserve.js
const here = require('heretag')
const metasyntatic = here(4, `
foo
bar
baz
bat
quz
`)
console.log(metasyntatic)
Four spaces of indentation will be preserved:
nn@Arkady:~$ node preserve.js
foo
bar
baz
bat
quz
nn@Arkady:~$ ▮
Tagged Templates
here
is also usable as a template tag:
here`
foo
bar
baz
`
In this form, space can be preserved like this:
here(2)`
foo
bar
baz
`
Newlines in Interpolated Variables
Most importantly, the tagged form of here
handles newlines in interpolated
variables gracefully. For example:
// inter-a.js
const here = require('heretag')
const example = "a\n b\nc\n"
const inter = here`
foo
bar
${example}
baz
`
console.log(inter)
Will produce:
nn@Arkady:~$ node inter-a.js
foo
bar
a
b
c
bat
nn@Arkady:~$ ▮
Conversely, with the standard form of here
:
// inter-b.js
const here = require('heretag')
const example = "a\n b\nc\n"
const inter = here(`
foo
bar
${example}
baz
`)
console.log(inter)
Will produce mangled output:
nn@Arkady:~$ node inter-b.js
foo
bar
a
b
c
bat
nn@Arkady:~$ ▮
Installation
npm install heretag
License
Copyright 2020-2024 0E9B061F Available under the terms of the MIT License.