Strings in JS

They’re either UTF-16 or UCS-2 (now obselete). Depends on the interpreter. Each character takes up 1 or 2 bytes. UTF-16 is the only UTF that is not compatible with ASCII.

To decode a string from a typed array use:

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new TextDecoder("utf-8").decode(uint8array); // or utf-16

Can I safely use someString[i] syntax? Some characters can take up 1 byte, and some 2. There’s String.prototype.codePointAt(), I think it solves this problem.

• How many bytes in a JavaScript string?
• How to convert an Uint8Array to string in Javascript