Logical nullish assignment. Unexpected token '??='

Question

I'm running this code with node.js:

const tasksSorted = {};
tasksSorted[0] ??= {};

Which I believe its valid. I get the error:

tasksSorted[0] ??= {}; 
               ^^^
SyntaxError: Unexpected token '??='

In the browser I can use the ??= Logical nullish assignment

Answer 1

According to the documentation, Logical nullish assignment is available for Node.js 15.0.0