How to split Unicode string to characters in JavaScript

问题

For long time we used naive approach to split strings in JS:

someString.split('');

But popularity of emoji forced us to change this approach - emoji characters (and other non-BMP characters) like 😂 are made of two "characters'.

String.fromCodePoint(128514).split(''); // array of 2 characters; can't embed due to StackOverflow limitations

So what is modern, correct and performant approach to this task?

回答1:

The best approach to this task is to use native String.prototype[Symbol.iterator] that's aware of Unicode characters. Consequently clean and easy approach to split Unicode character is Array.from used on string, e.g.:

const string = String.fromCodePoint(128514, 32, 105, 32, 102, 101, 101, 108, 32, 128514, 32, 97, 109, 97, 122, 105, 110, 128514);
Array.from(string);

回答2:

This question has already been answered but I think it's worth mentioning spread operator way.

let str="I can split unicode also ☺🤖😸 ";
console.log([...str]);

来源：https://stackoverflow.com/questions/35223206/how-to-split-unicode-string-to-characters-in-javascript