Assign property objects onto other objects, recursively

Footprint for assignment sits at around 400 bytes browserified, minified, and gzipped.

npm install assignment --save

Assigns every property of b onto a. If the an object already exists on a that has one of b's properties, then assignment(a.prop, b.prop) will assign all child properties of b.prop onto a.prop. This happens recursively.

Returns a.

It doesn't matter how many objects you hand to assignment, they will all be collapsed into the first one.

assignment(
  { name: 'mordecai' },
  { name: 'eileen' },
  { name: 'rigby' }
);
// <- { name: 'rigby' }

Object's get replaced recursively, property by property. Note that for any given property prop, you'll get back whatever the prototype was for the first prop that existed in a.

assignment(
  { character: { name: 'mordecai' } },
  { character: { color: 'red' } },
  { character: { name: 'margaret' } }
);
// <- { character: { name: 'margaret', color: 'red' } }

Note that arrays don't receive any special treatment. Typically, you want arrays to be replaced.

assignment(
  { characters: ['mordecai', 'margaret'] },
  { characters: ['rigby', 'eileen'] }
);
// <- { characters: ['rigby', 'eileen'] }

MIT