operators.md

Operators

How to check if two items are equal in vanilla JS	5/25
Operator Lookup	11/14
Comma Operator in JavaScript	10/7
MDN Expressions and operators	1/2/2020

Binary Operators

Compound assignment operators

Shorthand operator	Meaning
Assignment	x = y	x = y
Addition assignment	x += y	x = x + y
Subtraction assignment	x -= y	x = x - y
Multiplication assignment	x *= y	x = x * y
Division assignment	x /= y	x = x / y
Remainder assignment, (modulo)	x %= y	x = x % y
Exponentiation assignment	x **= y	x = x ** y
Left shift assignment	x <<= y	x = x << y
Right shift assignment	x >>= y	x = x >> y
Unsigned right shift assignment	x >>>= y	x = x >>> y
Bitwise AND assignment	x &= y	x = x & y
Bitwise XOR assignment	x ^= y	x = x ^ y
Bitwise OR assignment	`x	= y`

Comparison operators

Operator	Description	Examples returning true
Equal (==)	Returns true if the operands are equal.	3 == var1 "3" == var13 == '3'
Not equal (!=)	Returns true if the operands are not equal.	var1 != 4 var2 != "3"
Strict equal (===)	Returns true if the operands are equal and of the same type. See also Object.is and sameness in JS.	3 === var1
Strict not equal (!==)	Returns true if the operands are of the same type but not equal, or are of different type.	var1 !== "3" 3 !== '3'
Greater than (>)	Returns true if the left operand is greater than the right operand.	var2 > var1 "12" > 2
Greater than or equal (>=)	Returns true if the left operand is greater than or equal to the right operand.	var2 >= var1 var1 >= 3
Less than (<)	Returns true if the left operand is less than the right operand.	var1 < var2 "2" < 12
Less than or equal (<=)	Returns true if the left operand is less than or equal to the right operand.	var1 <= var2 var2 <= 5

Unary Operators

typeof
-
!

Ternary Operators

console.log(true ? 1 : 2);
// → 1
console.log(false ? 1 : 2);
// → 2