I am trying to get the actual size (in bytes) of a number and a string in browsers e.g. chrome.

I learned that in JavaScript numbers are represented in double precision takes up 64 bits and strings are UTF-16 code unit so it takes either 2 bytes or 4 bytes.

I first tried to use new Blob but it encodes string component characters as UTF-8 not UTF-16. And I know there is a Buffer.from API in Node but it is not available in a browser environment.

My question is how I can get the actual size of a number and a string in bytes from a browser, e.g. chrome?

CodePudding user response：

First of all it is important to realize that the spec doesn't mandate any representation. Just behavior.

Strings are stored in UTF-16 but fortunately for your purpose each index represents 16 bits.

For example

console.log('