In JavaScript, operators are special symbols or keywords that perform operations on values and variables. Here’s a rundown of the main types:

1. Arithmetic Operators

• + (Addition): Adds two values. 5 + 3 results in 8.
• - (Subtraction): Subtracts one value from another. 5 - 3 results in 2.
• * (Multiplication): Multiplies two values. 5 * 3 results in 15.
• / (Division): Divides one value by another. 6 / 3 results in 2.
• % (Modulus): Returns the remainder of a division operation. 5 % 3 results in 2.
• ** (Exponentiation): Raises a number to the power of another number. 2 ** 3 results in 8.

2. Assignment Operators

• =: Assigns a value to a variable. let x = 5 assigns 5 to x.
• +=: Adds and assigns. x += 3 is equivalent to x = x + 3.
• -=: Subtracts and assigns. x -= 3 is equivalent to x = x - 3.
• *=: Multiplies and assigns. x *= 3 is equivalent to x = x * 3.
• /=: Divides and assigns. x /= 3 is equivalent to x = x / 3.
• %=: Applies modulus and assigns. x %= 3 is equivalent to x = x % 3.

3. Comparison Operators

• ==: Equality. Checks if two values are equal, after type conversion. 5 == '5' is true.
• ===: Strict equality. Checks if two values are equal, without type conversion. 5 === '5' is false.
• !=: Inequality. Checks if two values are not equal, after type conversion. 5 != '5' is false.
• !==: Strict inequality. Checks if two values are not equal, without type conversion. 5 !== '5' is true.
• >: Greater than. 5 > 3 is true.
• <: Less than. 5 < 3 is false.
• >=: Greater than or equal to. 5 >= 5 is true.
• <=: Less than or equal to. 5 <= 5 is true.

4. Logical Operators

• && (Logical AND): Returns true if both operands are true. true && false is false.
• || (Logical OR): Returns true if at least one operand is true. true || false is true.
• ! (Logical NOT): Returns true if the operand is false. !true is false.

5. Unary Operators

• + (Unary plus): Converts a value to a number. + '5' results in 5.
• - (Unary minus): Negates a value. -5 results in -5.
• ++ (Increment): Increases a variable’s value by 1. x++ or ++x.
• -- (Decrement): Decreases a variable’s value by 1. x-- or --x.
• ! (Logical NOT): Inverts the boolean value. !true results in false.

6. Conditional (Ternary) Operator

• ? :: Evaluates a condition and returns one of two values. condition ? expr1 : expr2. If condition is true, expr1 is returned; otherwise, expr2 is returned.

7. Type Operators

• typeof: Returns the type of a variable. typeof 5 results in "number".
• instanceof: Checks if an object is an instance of a specific class. [] instanceof Array is true.

8. Bitwise Operators

• & (AND): Performs a bitwise AND. 5 & 3 results in 1.
• | (OR): Performs a bitwise OR. 5 | 3 results in 7.
• ^ (XOR): Performs a bitwise XOR. 5 ^ 3 results in 6.
• ~ (NOT): Inverts all the bits of a number. ~5 results in -6.
• << (Left shift): Shifts bits to the left. 5 << 1 results in 10.
• >> (Right shift): Shifts bits to the right. 5 >> 1 results in 2.
• >>> (Unsigned right shift): Shifts bits to the right, filling with zeros. 5 >>> 1 results in 2.