How to use the monocle-ts.Lens.fromNullableProp function in monocle-ts

To help you get started, we’ve selected a few monocle-ts examples, based on popular ways it is used in public projects.

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.map(v => 
      Lens.fromNullableProp(key)
        .set(v)(h)
    )

.map(mode =>
      Lens.fromNullableProp('mode')
        .set(mode)(o)
    );

const addToken = (t: string) => (h: Headers): DefaultHeaders => 
  Lens.fromNullableProp('Authorization')
    .set(`Bearer ${t}`)(h);