@tonaljs/duration-value !tonal 

> Functions to parse and manipulate time duration values

Usage

ES6:

``js
import { DurationValue } from "tonal";
`

node:

`js
const { DurationValue } = require("tonal");
`

single module:

`js
import DurationValue from "@tonaljs/duration-value";
`

API

#### DurationValue.names() => string[]

Return all duration names

`js
DurationValue.names(); // => ["large", "duplex longa", ...]
`

#### DurationValue.shorthands() => string[]

Return all duration value shorthands

`js
DurationValue.shorthands(); // => ["dl", "l", "d", "w", "h", "q", "e", "s", "t", "sf", "h", "th"]
`

#### DurationValue.get(name: string) // => object

Get a duration value object from name:

`js
DurationValue.get("quarter"); // =>
// {
// empty: false,
// name: 'q',
// value: 0.25,
// fraction: [ 1, 4 ],
// shorthand: 'q',
// dots: '',
// names: [ 'quarter', 'crotchet' ]
// }
`

The name accepts an arbitrary number of dots:

`js
DurationValue.get("quarter.."); // =>
// {
// empty: false,
// name: 'q..',
// value: 0.4375,
// fraction: [ 7, 16 ],
// shorthand: 'q',
// dots: '..',
// names: [ 'quarter', 'crotchet' ]
// }
`

Short names are accepted:

`js
DurationValue.get("q") == DurationValue.get("quarter");
DurationValue.get("q.") == DurationValue.get("quarter.");
DurationValue.get("q..") == DurationValue.get("quarter..");
`

Some aliases (value and fraction) are provided:

`js
DurationValue.value("q.."); // => 0.4375
DurationValue.fraction("q.."); // => [ 7, 16 ]
``

References

- https://en.wikipedia.org/wiki/Note_value