fancy-value-parser v1.0.0

What?

Transform fancy string values to usable JS objects.
Helpful for parsing HTML attribute values in custom elements/web components.

import parseOption from 'fancy-value-parser'

parseOption('foo')       // { type: null, value: 'foo' }
parseOption('foo:666')   // { type: 'pair', foo: 666, value: [{⋯}, {⋯}] }
parseOption('0-42')      // { type: 'range', value: [0, 42] }
parseOption('true')      // { type: 'boolean', value: true }
parseOption('/foo/')     // { type: 'regex', value: /foo/ }
parseOption('{foo,bar}') // { type: 'set', value: [{⋯}, {⋯}] }

In / Out

Notes

• Various types can be combined with simple pairs and sets.
• Pairs are read left-to-right.
• Sets cannot contain other sets.

Not yet supported

• key-value pairs like foo:bar
• booleans
• dates
• floating point numbers

I'm hesitant to support more complex types; at that point, the state being conveyed shouldn't be transported as strings.
Clearly this ☝️ goal has been abandoned with the addition of pairs and sets. But there are good use cases and they are well tested.