30-seconds-of-code/snippets/js/s/lowerize.md

title, type, language, tags, author, cover, dateModified

title	type	language	tags	author	cover	dateModified
Lowercase object keys	snippet	javascript	object	chalarangelo	building-facade	2023-02-12T05:00:00-04:00

Converts all the keys of an object to lower case.

• Use Object.keys() to get an array of the object's keys.
• Use Array.prototype.reduce() to map the array to an object, using String.prototype.toLowerCase() to lowercase the keys.

const lowerize = obj =>
  Object.keys(obj).reduce((acc, k) => {
    acc[k.toLowerCase()] = obj[k];
    return acc;
  }, {});

lowerize({ Name: 'John', Age: 22 }); // { name: 'John', age: 22 }