re-template-tag: easily compose regular expressions
This package provides the template tag re
for composing regular expressions.
Basic syntax
Syntax: the following two expressions produce the same regular expression.
re`/abc/gu`
/abc/gu
Composing regular expressions
import {re} from 're-template-tag';
const RE_YEAR = /([0-9]{4})/;
const RE_MONTH = /([0-9]{2})/;
const RE_DAY = /([0-9]{2})/;
const RE_DATE = re`/^${RE_YEAR}-${RE_MONTH}-${RE_DAY}$/u`;
RE_DATE.test('2017-01-23'); // true
More information
- Take a look at the unit tests.
- Check out the blog post on re-template-tag.
Acknowledgement
The syntax for separating flags from the actual regular expression is based on an idea by Mathias Bynens.