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The operators below are listed in descending order or precedence. The associativity column indicates the direction (left-to-right or right-to-left) in which items are evaluated.
| Operator | Description | Assoc |
|---|---|---|
| () | Grouping operator | L-R |
| [] | Array index delimiter | L-R |
| . | Property accessor | L-R |
| ++ | Postfix increment | L-R |
| -- | Postfix decrement | L-R |
| ! | Logical NOT | R-L |
| ~ | Bitwise NOT | R-L |
| ++ | Prefix increment | R-L |
| -- | Prefix decrement | R-L |
| - | Negate operand | L-R |
| delete | Delete a property from an object | R-L |
| new | Invokes an object constructor | R-L |
| typeof | Determines the type of a value | R-L |
| void | Always yields the undefined value | R-L |
| * | Multiply | L-R |
| / | Divide | L-R |
| % | Remainder | L-R |
| + | Convert the operand to a numeric value | L-R |
| + | Add | L-R |
| - | Subtract | L-R |
| + | Concatenate string | L-R |
| << | Bitwise shift left | L-R |
| >> | Bitwise shift right | L-R |
| >>> | Bitwise shift right (unsigned) | L-R |
| < | Compare less than | L-R |
| <= | Compare less than or equal to | L-R |
| > | Compare greater than | L-R |
| >= | Compare greater than or equal to | L-R |
| in | Property is in object | L-R |
| instanceof | Object is instance of another object | L-R |
| == | Compare equal to | L-R |
| != | Compare NOT equal to | L-R |
| === | Compare identically equal to | L-R |
| !== | Compare identically NOT equal to | L-R |
| & | Bitwise AND | L-R |
| ^ | Bitwise XOR | L-R |
| | | Bitwise OR | L-R |
| && | Logical AND | L-R |
| || | Logical OR | L-R |
| ?: | Conditional execution | R-L |
| = | Assign | R-L |
| *= | Multiply and assign | R-L |
| /= | Divide and assign | R-L |
| %= | Remainder and assign | R-L |
| += | Add and assign | R-L |
| -= | Subtract and assign | R-L |
| <<= | Bitwise shift left and assign | R-L |
| >>= | Bitwise shift right and assign | R-L |
| >>>= | Bitwise shift right (unsigned) and assign | R-L |
| &= | Bitwise AND and assign | R-L |
| |= | Bitwise inclusive OR and assign | R-L |
| ^= | Bitwise XOR and assign | R-L |
| , | Argument delimiter | L-R |
| ; | Empty statement | L-R |
| { } | Delimit code block | L-R |
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| Operator | Up | OptGroupElement object |
JavaScript Programmer's Reference, Cliff Wootton Wrox Press (www.wrox.com) Join the Wrox JavaScript forum at p2p.wrox.com Please report problems to support@wrox.com © 2001 Wrox Press. All Rights Reserved. Terms and conditions. | ||