githubmirror/immutable-js

src/functional/set.js

26 строк830 B

Lee Byron

Relicence and copyright (#1814)

18 июн 2021, 01:53

18 июн 2021, 01:535155a7f

import { isImmutable } from '../predicates/isImmutable';
import hasOwnProperty from '../utils/hasOwnProperty';
import isDataStructure from '../utils/isDataStructure';
import shallowCopy from '../utils/shallowCopy';

export function set(collection, key, value) {
  if (!isDataStructure(collection)) {
    throw new TypeError(
      'Cannot update non-data-structure value: ' + collection
    );
  }
  if (isImmutable(collection)) {
    if (!collection.set) {
      throw new TypeError(
        'Cannot update immutable value without .set() method: ' + collection
      );
    }
    return collection.set(key, value);
  }
  if (hasOwnProperty.call(collection, key) && value === collection[key]) {
    return collection;
  }
  const collectionCopy = shallowCopy(collection);
  collectionCopy[key] = value;
  return collectionCopy;
}