method TextEncoder.prototype.encodeInto
#TextEncoder.prototype.encodeInto(src: string,dest: Uint8Array,): EncodeIntoResultUTF-8 encodes the src string to the dest Uint8Array and returns an object
containing the read Unicode code units and written UTF-8 bytes.
const encoder = new TextEncoder();
const src = 'this is some data';
const dest = new Uint8Array(10);
const { read, written } = encoder.encodeInto(src, dest);