1.0.1 • Published 6 years ago
null-propagation v1.0.1
null-propagation
Emulate null propagation operator.
Like Facebook's idx
and Lodash's get
,
but even more terse than the former, and real syntax unlike the latter.
The use of real syntax enables static analysis tools.
import np from 'null-propagation'
const obj = {
a: {
b: 'B2'
},
z: []
}
For undefined values, returns undefined:
const c = np(() => obj.a.c)
With a default as a 2nd argument, returns that value:
const c2 = np(() => obj.a.c, 'C2')
For defined values, returns that value:
const b = np(() => obj.a.b)
Works with arrays, returns undefined:
const z = np(() => obj.z[0].y)
Throws other errors:
np(() => { throw new Error('some error') })