balanced-match#
Match balanced string pairs, like { and } or <b> and </b>. Supports regular expressions as well!
Example#
Get the first matching pair of braces:
var balanced = require('balanced-match');
console.log(balanced('{', '}', 'pre{in{nested}}post'));
console.log(balanced('{', '}', 'pre{first}between{second}post'));
console.log(balanced(/\s+\{\s+/, /\s+\}\s+/, 'pre { in{nest} } post'));The matches are:
$ node example.js
{ start: 3, end: 14, pre: 'pre', body: 'in{nested}', post: 'post' }
{ start: 3,
end: 9,
pre: 'pre',
body: 'first',
post: 'between{second}post' }
{ start: 3, end: 17, pre: 'pre', body: 'in{nest}', post: 'post' }API#
var m = balanced(a, b, str)#
For the first non-nested matching pair of a and b in str, return an
object with those keys:
- start the index of the first match of
a - end the index of the matching
b - pre the preamble,
aandbnot included - body the match,
aandbnot included - post the postscript,
aandbnot included
If there's no match, undefined will be returned.
If the str contains more a than b / there are unmatched pairs, the first match that was closed will be used. For example, {{a} will match ['{', 'a', ''] and {a}} will match ['', 'a', '}'].
var r = balanced.range(a, b, str)#
For the first non-nested matching pair of a and b in str, return an
array with indexes: [ <a index>, <b index> ].
If there's no match, undefined will be returned.
If the str contains more a than b / there are unmatched pairs, the first match that was closed will be used. For example, {{a} will match [ 1, 3 ] and {a}} will match [0, 2].
Installation#
With npm do:
npm install balanced-matchSecurity contact information#
To report a security vulnerability, please use the
Tidelift security contact.
Tidelift will coordinate the fix and disclosure.
License#
(MIT)
Copyright (c) 2013 Julian Gruber <[email protected]>
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
of the Software, and to permit persons to whom the Software is furnished to do
so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.