Order of Operations in JavaScript

Order of Operations in JavaScript

Operators are evaluated in the order supplied in the following table. Associativity applies when more than one operation with the same precedence takes place. Left-to-right Associativity means that operations of equal weight in a single statement are performed from left to right.

Order	Assoc	Operator	Summary
1	L L L R	. [] () new	Retrieve object property. Array index or associative object property. Function call. Instantiate an object.
2	R R R R R R R R R	++ -- - + ~ ! delete typeof void	Pre- or post-increment. (unary) Pre- or post-decrement. (unary) Negation. (unary, NOT subtraction) No operation, use numerical value. (unary, NOT addition) Bitwise complement. (unary) Logical complement. (unary) Destroy an object property. (unary) Return datatype. (unary) Return undefined. (unary)
3	*, /, %	L	Multiply, divide, modulo (remainder)
4	L L	+, - +	Add, subtract. Concatenate strings.
5	L L L	<< >> >>>	Shift left. Shift right and extend sign. Shift right and pad with zeroes.
6	L L L L	<, <= >, >= instanceof in	Less than, less than or equal. Greater than, greater than or equal. Verify an object's constructor. Verify an object's property exists.
7	L L L L	== != === !==	Are operands equal? Are operands NOT equal? Are operands identical? Are operands NOT identical?
8	L	&	Bitwise AND
9	L	^	Bitwise XOR
10	L	\|	Bitwise OR
11	L	&&	Local AND
12	L	\|\|	Local OR
13	R	? :	Conditional operator (ternary)
14	R R	= *=, /=, %=, +=, -=, <<=, >>=, >>>=, &=, ^=, \|=	Assign value. Perform operation, then assign value.
15	L	, (comma)	Multiple evaluation.

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