string-cooked
In ECMAScript 6, a
template tag function
called t is any function that matches the signature (parts, ...subs), and
can be used in this manner:
const s = t`interpolated string here`;In many scenarios, you may want to use this as a way to simplify a function call, e.g.:
const s = t(`interpolated string here`);To do so, we need some function f that interpolates a template string with the
same behavior as an untagged template literal, a purpose not satisfied by the
built-in function String.raw. This module, string-cooked, is a function that
serves the aforementioned purpose.
Behavior
The function mimics two default behaviors.
Escape sequences interpretation
import cooked from 'string-cooked';
'\n'.length === 1;
`\n`.length === 1;
String.raw`\n`.length === 2;
cooked`\n`.length === 1;Interpolation
import cooked from 'string-cooked';
const [a, b] = [1, 2];
const manual = a + ',' + b;
`${a},${b}` === manual;
String.raw`${a},${b}` === manual;
cooked`${a},${b}` === manual;Examples
Making an html tag function using jsdom:
import cooked from 'string-cooked';
import {JSDOM} from 'jsdom';
export function html(strings, ...subs) {
return new JSDOM(cooked(strings, ...subs));
}
// usage:
const dom = html`<!DOCTYPE html><body><p>hello</p></body>`;Making an md tag function using
markdown-js:
import cooked from 'string-cooked';
import {markdown} from 'markdown';
export function md(strings, ...subs) {
return markdown.toHTML(cooked(strings, ...subs));
}
// usage:
const fragment = md`
# Heading
* Bullet 1
* Bullet 2
`;