Update for ch5.md (Section - Multiple Views)

[WispProxy]

If we try using of "buf" = 2 bits, we will have exceptions for all variables.

Browser: Chrome latest

Exception:

VM200:2 Uncaught RangeError: Invalid typed array length: 2
at typedArrayConstructByArrayBuffer ()
at new Uint16Array (native)
at :2:13

Valid example:

var buf1 = new ArrayBuffer( 4 );
var first = new Uint16Array( buf1, 0, 2 )[0];

var buf2 = new ArrayBuffer( 3 );
var second = new Uint8Array( buf2, 2, 1 )[0];

var buf3 = new ArrayBuffer( 4 );
var third = new Uint8Array( buf3, 3, 1 )[0];

var buf4 = new ArrayBuffer( 20 );
var fourth = new Float32Array( buf4, 4, 4 )[0];

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Need add to example "buf" = 20 or set custom "buf" for each variable.
After that please update the text if this remark is correct.

[getify]

It's true that buf actually has to be an array... and the snippet doesn't show that. But the paragraph above explains that you have to assume buf already has specific contents. Your addition only makes an empty buf which actually conflicts with what the paragraph says.

A perhaps clearer approach would be to have a code comment in the snippet (in place of that buf declaration) that reinforces that buf is assumed to already exist as a buffer.