JavaScript trim all own property key names of an object?

Question

How to trim all own (not inherited) property keys / names of an object? To trim the key name, not the property's value.

PS. Closest similar question I found is about trimming property values: javascript : trim all properties of an object

EDIT: This question was suggested as a possible duplicate. However, I'm explicitly needing to trim just the key name, not the value: Trim white spaces in both Object key and value recursively

Answer 1

As far as i understood, Object.keys() or Object.entries() should do the job.

const obj = { "a " : 1 , "   b " : 2 };

const trimmed = Object.entries(obj).reduce((acc, curr) => {
  let [key, value] = curr;
  // Checking if the key is a string
  acc[typeof key === "string" ? key.trim() : key] = value; 
  return acc;
}, {});

console.log(trimmed); // -> { a: 1, b: 2 } notice the trimmed keys