I have a basic question. Say I have a Uint16Array and I have number 4 in it.

data_16=new Uint16Array([4]);  

Now I have a length 1 and byteLength 2;

how do i convert this to Uint8Array.

I do not want to create a new view.

data_8 = new Uint8Array(data_16)

If I do this I get array length 1 and byteLength 1. This is not what I want.

I need to stretch that 16 bit value in 16array into 8 bit values so that 8bit array so it would end up with 2 values int 8 bit array.

I can just create a funtion which converts with shif and to all that stuff. But Can it be done with Array manipulation only?

I have a basic question. Say I have a Uint16Array and I have number 4 in it.

data_16=new Uint16Array([4]);  

Now I have a length 1 and byteLength 2;

how do i convert this to Uint8Array.

I do not want to create a new view.

data_8 = new Uint8Array(data_16)

If I do this I get array length 1 and byteLength 1. This is not what I want.

I need to stretch that 16 bit value in 16array into 8 bit values so that 8bit array so it would end up with 2 values int 8 bit array.

I can just create a funtion which converts with shif and to all that stuff. But Can it be done with Array manipulation only?

• javascript
• arraybuffer
• uint16

2 Answers 2

You can use the buffer property, i.e. data_8 = new Uint8Array(data_16.buffer, data_16.byteOffset, data_16.byteLength).

Would like to note that the current accepted answer may not work because of the byte order is platform dependent.