What's the most efficient way to turn all the keys of an object to lower case - JavaScript?

Let’s say the following is our object −

var details = {    "STUDENTNAME": "John",    "STUDENTAGE": 21,    "STUDENTCOUNTRYNAME": "US" }

As you can see above, the keys are in capital case. We need to turn all these keys to lower case. Use toLowerCase() for this.

Example

Following is the code −

var details = {    "STUDENTNAME": "John",    "STUDENTAGE": 21,    "STUDENTCOUNTRYNAME": "US" } var tempKey, allKeysOfDetails = Object.keys(details); var numberOfKey = allKeysOfDetails.length; var allKeysToLowerCase = {} while (numberOfKey--) {    tempKey = allKeysOfDetails[numberOfKey];    allKeysToLowerCase[tempKey.toLowerCase()] = details[tempKey]; } console.log(allKeysToLowerCase);

To run the above program, you need to use the following command −

node fileName.js.

Here, my file name is demo297.js.

Output

This will produce the following output on console −

PS C:\Users\Amit\javascript-code> node demo297.js { studentcountryname: 'US', studentage: 21, studentname: 'John' }