JavaScript Operator Precedence

Operator Precedence Table

This table ranks JavaScript operators by their precedence, with the higher-precedence operators (executed first) at the top.

Operator Precedence Operator Description Associativity Example
1 () Grouping L -> R (expression)
2 . Member of object L -> R Object_name.property
2 () Function call L -> R Test()
2 new To create objects R -> L New example()
2 [] Member of object L -> R Object[“property”]
3 Postfix decrement p–;
3 ++ Postfix increment p++
4 Prefix decrement R -> L –p;
4 ++ Prefix increment R -> L ++p;
4 typeof To get the variable type R -> L typeof a;
4 ! Logical not R -> L !a;
4 ~ Bitwise not R -> L ~p
4 Unary minus R -> L -p
4 + Unary plus R -> L +p
4 delete To delete object property R -> L Delete arr[0]
4 void Evaluates void R -> L Void(1)
5 ** Exponentiation operator R -> L p ** q
6 * Multiplication L -> R p * q
6 / Division L -> R p / q
6 % modulo L -> R p % q
7 + Addition or plus operator L -> R p + q
7 Subtraction operator L -> R p – q
8 << Left shift L -> R p << 2
8 >> Signed right shift L -> R p >> 2
8 >>> Unsigned right shift L -> R p >>> 2
9 in Property in object L -> R x in y
9 instanceof Instance of object L -> R p instanceof Object
9 < Less than L -> R p < q
9 <= Less than or equal to L -> R p <= q
9 > Greater than L -> R p > q
9 >= Greater than or equal to L -> R p >= q
10 == Equality L -> R p == q
10 != Inequality L -> R p != q
10 === Strict equality L -> R p === q
10 !== Strict inequality L -> R p !== q
11 & Bitwise AND L -> R p & q
12 ^ Bitwise XOR L -> R p ^ q
13 | Bitwise OR L -> R p | q
14 && Logical AND L -> R p && q
15 || Logical OR L -> R p || q
16 ?? Nullish Coalescing R -> L p ?? q
17 = Assignment R -> L p = q
17 : Colon assignment R -> L p : q
17 += Addition assignment R -> L p += q
17 -= Subtraction assignment R -> L p -= q
17 *= Multiplication assignment R -> L p *= q
17 /= Division assignment R -> L p /= q
17 %= Modulo assignment R -> L p %= q
17 **= Exponentiation assignment R -> L p **= q
17 <<= Left shift assignement R -> L p <<= q
17 >>= Right shift assignment R -> L p >>= q
17 >>>= Unsigned right shift assignment R -> L p >>>= q
17 &= Bitwise AND assignment R -> L p &= q
17 ^= Bitwise XOR assignment R -> L p ^= q
17 |= Bitwise OR assignment R -> L p |= q
17 &&= Logical AND assignment R -> L p &&= q
17 ||= Logical OR assignement R -> L p ||= q
17 => Arrow operator (a, b )=> { // function code}
17 Spread operator [… arr]
18 yield Pause / Resume R -> L yield p;
19 , Comma operator L -> R (5, 10, 15)

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