Allocate memory with typed array

TypedArrayToHeap.js

function TypedArrayToHeap(arr) {
    const { name, BYTES_PER_ELEMENT } = arr.constructor;
    const prefix = name.charAt(0).replace(/I|B/, '');
    const heap = Module[`HEAP${prefix}${BYTES_PER_ELEMENT << 3}`];

    if (!heap) {
      throw new Error(`Unknow typed array ${heap}`);
    }
    const ptr = Module._malloc(arr.length * BYTES_PER_ELEMENT);
    heap.set(arr, ptr / BYTES_PER_ELEMENT);
    return ptr;
}