🧩 IF (else) — GTM Variable Template for Logic

VARIABLES › LOGIC

🧩 IF (else) CORE Logic

Direct (.tpl)

Returns one of two values based on a boolean condition flag.

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Examples

True condition returns value▶ Try

INPUT

Condition: true
Output: success
Default Output: failure

OUTPUT

success

False returns default▶ Try

INPUT

Condition: false
Output: success
Default Output: failure

OUTPUT

failure

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GTM Configuration

This is what you'll see when you open this variable in Google Tag Manager. Hover the icons for details.

🧩 IF (else)

Read-Only Try Live

IF ⬇

Condition

THEN ⬇

Output

Add ELSE logic

ELSE ⬇

Default Output

The value to return if none of the rules evaluate to true. Defaults to undefined.

Result Handling

Output Function (optional)

Optional function to apply to the result before returning it (e.g., `str => str + ' €'`). Useful for chaining transformations on the output.

Condition string

💡 Type any text to see the result update live

🎯 Using special value — click input to type instead

Test with:

Falsy undefined null "" empty 0 false NaN

Truthy true 42 "hello" {} empty [] empty {a:1} [1,2,3]

Output string

Add ELSE logic

Default Output string

🔗 Result Handling — Chain Variables

Chain apply-mode variables to the output. Each variable receives the result of the previous one.

ifElse()

+ Chain another variable

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Related Variables

Same category: Logic

→ 🧩 AND → 🧩 IF AND_OR → 🧩 IF ELSE IF (Advanced) → 🧩 IF ELSE IF (Predefined) → 🧩 NOT → 🧩 OR → 🧩 WEIGHTED (Advanced) → 🧩 WEIGHTED (Predefined) → 🧩 XOR

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Under the Hood

📜 View Implementation Code

/**
 * Evaluates a condition and returns one of two values (ternary operator).
 * Returns result value if condition is true, or default value if false.
 *
 * @param {*} con - Condition to evaluate for truthiness.
 * @param {*} res - Value to return when condition is true.
 * @param {boolean} ael - Whether to use def value when condition is false (add else).
 * @param {*} def - Value to return when condition is false (if ael is true).
 *
 * @returns {*} res value if condition is true, or def value (if ael is true) or undefined if false.
 *
 * @framework ggLowCodeGTMKit
 */
const ifElse = function(con, res, ael, def) {
	const condition = !!con;
	const output = ael ? def : undefined;
	return condition ? res : output;
};
const safeFunction = fn => typeof fn === 'function' ? fn : x => x;
const out = safeFunction(data.out);
// ===============================================================================
// ifElse - Direct mode
// ===============================================================================
return out(ifElse(data.con, data.res, data.ael, data.def));

🧪 View Test Scenarios (5 tests)

✅ '[example] True condition returns value'
✅ '[example] False returns default'
✅ Test condition false with ael false returns undefined
✅ Test truthy value as condition
✅ Test falsy value as condition with default