chord-parser
v0.1.1
Published
Parse guitar chords contained within a string of tablature
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chord-parser
Utility for parsing guitar chords contained within a string of tablature. The most common use case is to wrap all chords found within a song in an anchor tag so that their finger chart can be presented in a tooltip.
Install
npm install chord-parser
or if using on the web, grab the dist/chord-parser.min.js
file.
Usage
var input = '\
Gsus4 Fsus4 F Csus4 C Gsus4/B \
e|------------3-------------------1-----|-------1---------------0-----------| \
B|---------3-----3-------------------1--|----------------1------1-------1---| \
G|------5-----------5-----3--2----------|----2--------------0--------------0| \
D|-5-------------------5--3--3----------|-3-----------3-----2---------0-----| \
A|--------------------------------------|----------3---------------2--------| \
E|--------------------------------------|-----------------------------------| ';
// Import chord-parser
var ChordParser = require('chord-parser');
// Create a new ChordParser object with the input string
var tabs = new ChordParser(input);
// Wrap chords found in the string (Gsus4, Fsus4, etc.) with an anchor tag
var wrappedTab = tabs.wrap(function(chord) {
return '<a href="">' + chord + '</a>';
});
// Return an array of unique chords found in the string
var uniques = tabs.unique(); // => ['C', 'Csus4', 'F', 'Fsus4', 'Gsus4', 'Gsus4/B'];
API
constructor
Create a new chord parsing object passing in a string of guitar tabs/chords to parse:
var parser = new ChordParser(inputString);
wrap(replacerFn[, options]);
This method calls the function replacerFn
for each chord it finds in the
input string, passing in the chord in as its only argument. Your wrapper function should
return a string to replace the chord with. A modified version of the input
string with the transposed replacements is returned.
new ChordParser('Ab C#').wrap(function(chord) {
return '<a>' + chord + '</a>';
});
// Return value: '<a>Ab</a> <a>C#</a>'
all([options])
Return a sorted array of all chords found in the input string.
new ChordParser('Ab C# B C#').all();
// Return value: ['Ab', 'B', 'C#', 'C#']
unique([options])
Return a sorted array of unique chords found in the input string.
new ChordParser('Ab C# B C#').unique();
// Return value: ['Ab', 'B', 'C#']
Options
All methods accept an options object as their last argument (or in unique
and all
's case, the only argument).
ignorecase
(boolean) - Whether or not to ignore case sensitivity when searching the string for chords. Defaults to false.
Tests
Run npm test
.
License
MIT.