DoesMatch

A small lib for matching text searches by relevance.

Live demo.

Installation

npm install does-match

Usage

CommonsJS

var doesMatch = require('does-match');
doesMatch(text, query);

Browser global

doesMatch(text, query);

Example

Matching songs names to match a search and order by relevance:

var doesMatch = require('does-match');
var search = 'somebody to love';

doesMatch('Somebody To Love', search); // 64
doesMatch('To Love Somebody', search); // 24
doesMatch('Use Somebody', search); // 16
doesMatch('One Way Road', search); // 0

Options

Defaults :

doesMatch(text, query, {
  highlightMatches: false,
  highlightStart: '<strong>',
  highlightEnd: '</strong>',
  minWord: 3,
  replaceDiacritics: true
});

Explanation of each option:

highlightMatches

boolean

If false, the return of the function will be only the relevance score. If true, the return of the function will be an object containing the relevance and the original text with the matched parts highlighted.

doesMatch('Somebody To Love', 'love some', { highlightMatches: true });

will return:

{
  match: '<strong>Some</strong>body To <strong>Love</strong>',
  relevance: 16
}

highlightStart

string

The token to be used in the start of each highlighted part.

highlightEnd

string

The token to be used in the end of each highlighted part.

minWord

number

Minimum word length to take in account in words match.

replaceDiacritics

boolean

If true, the text 'Québec' will be matched both by 'quebec' and 'québec' queries.

If false, the text 'Québec' will be matched only by 'québec'.

How does it work

doesMatch will try to match your query in 3 ways and return the one with the highest relevance score:

1. whole match: will try to find the whole exact query inside the text
2. words match: will try to find as much words from the query as possible inside the text, in any order
3. lookahead match: something like what text editors do when looking for a file, it will try to find all chars from the query, in order. Something like finding "dos mtch" inside "does match"

License

This software is licensed under the MIT license