Message
TypeError: invalid arguments (Firefox)
Error type
What went wrong?
Typed array constructors require either
- a length,
- another typed array,
- array-like objects,
- iterable objects or
- an
ArrayBuffer
object
to create a new typed array. Other constructor arguments will not create a valid typed array.
Examples
Typed arrays, for example a Uint8Array
, can't be constructed from a string. In fact, strings can't be in typed arrays at all.
var ta = new Uint8Array("nope"); // TypeError: invalid arguments
Different ways to create a valid Uint8Array
:
// From a length var uint8 = new Uint8Array(2); uint8[0] = 42; console.log(uint8[0]); // 42 console.log(uint8.length); // 2 console.log(uint8.BYTES_PER_ELEMENT); // 1 // From an array var arr = new Uint8Array([21,31]); console.log(arr[1]); // 31 // From another TypedArray var x = new Uint8Array([21, 31]); var y = new Uint8Array(x); console.log(y[0]); // 21 // From an ArrayBuffer var buffer = new ArrayBuffer(8); var z = new Uint8Array(buffer, 1, 4); // From an iterable var iterable = function*(){ yield* [1,2,3]; }(); var uint8 = new Uint8Array(iterable); // Uint8Array[1, 2, 3]