JavaScript Operators List
The following JavaScript operators reference, lists JavaScript operators by their order of precedence. First operator in the list has higher precedence as compared to the operator listed next in the list.
The third column of the table represents the Operator Associativity (or Order of Evaluation) it can be from Right-to-Left or Left-to-Right.
| Operator | Operation | Operator Associativity |
|---|---|---|
| ++ | Pre- or post-increment | Right-to-Left |
| -- | Pre- or post-decrement | Right-to-Left |
| - | Negate number | Right-to-Left |
| + | Convert to number | Right-to-Left |
| ~ | Invert bits | Right-to-Left |
| ! | Invert boolean value | Right-to-Left |
| delete | Remove a property | Right-to-Left |
| typeof | Determine type of operand | Right-to-Left |
| void | Return undefined value | Right-to-Left |
| ** | Exponentiate | Right-to-Left |
| *, /, % | Multiply, divide, remainder | Left-to-Right |
| +, - | Add, subtract | Left-to-Right |
| + | Concatenate strings | Left-to-Right |
| << | Shift left | Left-to-Right |
| >> | Shift right with sign extension | Left-to-Right |
| >>> | Shift right with zero extension | Left-to-Right |
| <,<=,>,>= | Compare in numeric order | Left-to-Right |
| instanceof | Test object class | Left-to-Right |
| in | Test whether property exists | Left-to-Right |
| == | Test for non-strict equality | Left-to-Right |
| != | Test for non-strict inequality | Left-to-Right |
| === | Test for strict equality | Left-to-Right |
| !== | Test for strict inequality | Left-to-Right |
| & | Compute bitwise AND | Left-to-Right |
| ^ | Compute bitwise XOR | Left-to-Right |
| | | Compute bitwise OR | Left-to-Right |
| && | Compute logical AND | Left-to-Right |
| || | Compute logical OR | Left-to-Right |
| ?? | Choose 1st defined operand | Left-to-Right |
| ?: | Choose 2nd or 3rd operand | Right-to-Left |
| = | Assign to a variable or property | Right-to-Left |
| **=, *=, /=, %=,+=, -=, &=, ^=, |=,>=, >>>= | Operate and assign | Right-to-Left |
| ' | Discard 1st operand, return 2nd | Left-to-Right |