Right shifts the value of a variable by the number of bits specified in the value of an expression, without maintaining sign, and assigns the result to the variable.
result >>>= expression
Using the >>>= operator is exactly the same as doing the following:
result = result >>> expression
The >>>= operator shifts the bits of result right by the number of bits specified in expression. Zeroes are filled in from the left. Digits shifted off the right are discarded. For example:
var temp temp = -14 temp >>>= 2
The variable temp has an initial value of -14 (11111111 11111111 11111111 11110010 in two's complement binary). When shifted right two bits, the value equals 1073741820 (00111111 11111111 11111111 11111100 in binary).
Supported in the following document modes: Quirks, Internet Explorer 6 standards, Internet Explorer 7 standards, Internet Explorer 8 standards, Internet Explorer 9 standards, Internet Explorer 10 standards, Internet Explorer 11 standards. Also supported in Store apps (Windows 8 and Windows Phone 8.1). See Version Information.