Intro to the operator methods

Note

In the function editor, you can perform any JS methodusing values from cookies, variables, parameters, request responses, inputs, or forms. Be sure to use the parameters correctly.

Addition (+)

Description Adds two numbers or concatenates strings. Be cautious: mixing numbers and strings triggers type coercion.

/* Keep in mind that this example has fixed values, however,
you can replace any value with a value from a cookie, variable, form, input, etc. */
return (sum = 3 + 5); // 8
return (text = 'Price: $' + 99); // "Price: $99"

Subtraction (-)

Description Subtracts two numbers. Converts strings to numbers if possible (e.g., "5" - 2 → 3).

/* Keep in mind that this example has fixed values, however,
you can replace any value with a value from a cookie, variable, form, input, etc. */
return (result = 10 - 3); // 7

Multiplication (*)

Description Multiplies two numbers. Non-numeric values are coerced to numbers (e.g., "2" * "3" → 6).

/* Keep in mind that this example has fixed values, however,
you can replace any value with a value from a cookie, variable, form, input, etc. */
return (total = 4 * 5); // 20

Division (/)

Description Divides two numbers. Returns Infinity if divided by 0.

/* Keep in mind that this example has fixed values, however,
you can replace any value with a value from a cookie, variable, form, input, etc. */
return (quotient = 15 / 3); // 5

Modulus (%)

Description Returns the remainder of a division. Useful for even/odd checks or cyclic patterns.

/* Keep in mind that this example has fixed values, however,
you can replace any value with a value from a cookie, variable, form, input, etc. */
return (remainder = 10 % 3); // 1 (10 ÷ 3 = 3 with remainder 1)

Exponentiation (**)

Description Raises a base to the power of an exponent (e.g., 2 ** 3 → 8).

/* Keep in mind that this example has fixed values, however,
you can replace any value with a value from a cookie, variable, form, input, etc. */
return (power = 2 ** 4); // 16

Increment (++)

Description Increases a number by 1. Use as prefix (++x) or postfix (x++).

/* Keep in mind that this example has fixed values, however,
you can replace any value with a value from a cookie, variable, form, input, etc. */
let count = 5;
return count++; // count becomes 6

Decrement (--)

Description Decreases a number by 1. Use as prefix (--x) or postfix (x--).

/* Keep in mind that this example has fixed values, however,
you can replace any value with a value from a cookie, variable, form, input, etc. */
let count = 5;
return count--; // count becomes 4

Equality (==)

Description Compares values with type coercion (e.g., 5 == "5" → true). Avoid in most cases.

/* Keep in mind that this example has fixed values, however,
you can replace any value with a value from a cookie, variable, form, input, etc. */
return 5 == '5'; // true

Strict Equality (===)

Description Compares values and types (no coercion). Preferred for reliable comparisons.

/* Keep in mind that this example has fixed values, however,
you can replace any value with a value from a cookie, variable, form, input, etc. */
return 5 === '5'; // false

Inequality (!=)

Description Checks if values are different with type coercion.

/* Keep in mind that this example has fixed values, however,
you can replace any value with a value from a cookie, variable, form, input, etc. */
return 5 != '5'; // false (due to coercion)

Strict Inequality (!==)

Description Checks if values or types differ (no coercion). Safer than !=.

/* Keep in mind that this example has fixed values, however,
you can replace any value with a value from a cookie, variable, form, input, etc. */
return 5 !== '5'; // true

Greater Than (>) & Less Than (<)

Description Compares numeric values or string lexicographical order.

/* Keep in mind that this example has fixed values, however,
you can replace any value with a value from a cookie, variable, form, input, etc. */
return 10 > 5; // true
return 'apple' < 'banana'; // true (a < b alphabetically)

Greater Than or Equal (>=) & Less Than or Equal (<=)

Description Similar to >/< but includes equality.

/* Keep in mind that this example has fixed values, however,
you can replace any value with a value from a cookie, variable, form, input, etc. */
return 5 >= 5; // true

Logical AND (&&)

Description Returns true if both operands are truthy. Returns the first falsy value or last truthy.

/* Keep in mind that this example has fixed values, however,
you can replace any value with a value from a cookie, variable, form, input, etc. */
return true && 5 > 3; // true

Logical OR (||)

Description Returns true if at least one operand is truthy. Returns the first truthy value.

/* Keep in mind that this example has fixed values, however,
you can replace any value with a value from a cookie, variable, form, input, etc. */
return false || 'default'; // "default"

Logical NOT (!)

Description Inverts a boolean value. Converts truthy/falsy values to boolean.

/* Keep in mind that this example has fixed values, however,
you can replace any value with a value from a cookie, variable, form, input, etc. */
return !true; // false

Assignment (=)

Description Assigns a value to a variable.

/* Keep in mind that this example has fixed values, however,
you can replace any value with a value from a cookie, variable, form, input, etc. */
let x = 10;
return x;

Add & Assign (+=)

Description Adds a value to a variable and updates it.

/* Keep in mind that this example has fixed values, however,
you can replace any value with a value from a cookie, variable, form, input, etc. */
let total = 5;
return (otal += 3); // total = 8

Ternary Conditional (? :)

Description Shorthand for if-else. Syntax: condition ? exprIfTrue : exprIfFalse.

/* Keep in mind that this example has fixed values, however,
you can replace any value with a value from a cookie, variable, form, input, etc. */
const access = age >= 18 ? 'Granted' : 'Denied';
return access;

Nullish Coalescing (??)

Description Returns the right-hand operand if the left is null or undefined.

/* Keep in mind that this example has fixed values, however,
you can replace any value with a value from a cookie, variable, form, input, etc. */
return i.login_name ?? 'Guest';

Optional Chaining (?.)

Description Safely accesses nested properties. Returns undefined if any chain link is null/undefined.

/* Keep in mind that this example has fixed values, however,
you can replace any value with a value from a cookie, variable, form, input, etc. */
return r.request_name.data.user?.address?.city;

typeof

Description Returns a string indicating the type of a variable.

/* Keep in mind that this example has fixed values, however,
you can replace any value with a value from a cookie, variable, form, input, etc. */
return typeof 'hello'; // "string"

Spread (...)

Description Expands arrays/objects into individual elements. Used for copying, merging, or function arguments.

/* Keep in mind that this example has fixed values, however,
you can replace any value with a value from a cookie, variable, form, input, etc. */
const merged = [...arr1, ...arr2];
return merged;

Nullish Assignment (??=)

Description Assigns a value only if the variable is null/undefined.

/* Keep in mind that this example has fixed values, however,
you can replace any value with a value from a cookie, variable, form, input, etc. */
let config = null;
return (config ??= { theme: 'light' }); // config becomes { theme: "light" }

Logical AND Assignment (&&=)

Description Assigns a value only if the variable is truthy.

/* Keep in mind that this example has fixed values, however,
you can replace any value with a value from a cookie, variable, form, input, etc. */
let value = 'Hello';
return (value &&= 'Updated'); // value becomes "Updated"

in

Description Checks if a property exists in an object.

/* Keep in mind that this example has fixed values, however,
you can replace any value with a value from a cookie, variable, form, input, etc. */
return 'name' in { name: 'Alice' }; // true