Using the of() method

Collection types in Immutable.js have a static of() method. This method is an alternative to using the collection constructor. The one downside to using the constructor approach is that you have to pass in a JavaScript literal. You have to build and allocate memory for a structure that you're not actually using.

The of() method uses the arguments that are passed to it as the collection items.

Lists of values

You can use the of() method to create lists of values as follows:

const myList = List.of(1, 2, 3);
console.log('myList', myList.toJS());
// -> myList [ 1, 2, 3 ]

Maps of values

...