isUnixTimestamp — GTM Variable Template for Condition

VARIABLES › CONDITION

isUnixTimestamp EXTENDED Condition

Direct (.tpl) Apply (.tpl)

Check if the input is a valid Unix timestamp.

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Examples

Seconds timestamp▶ Try

INPUT

Value To Check: 1609459200

OUTPUT

true

Milliseconds timestamp▶ Try

INPUT

Value To Check: 1609459200000

OUTPUT

true

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GTM Configuration

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isUnixTimestamp

Read-Only Try Live

Value To Check

💾 The value to check.

Supported formats:
  ✓ All

Input Setup

Input Function (optional)

⚙️ Optional pre-processing function applied to the input before internal logic (e.g., convert object to string, normalize case). Internal transformations such as case handling will still apply afterward.

Result Handling

Output Function (optional)

⚙️ Optional function to apply to the result before returning it (e.g., str => str + '€', val => val !== undefined for boolean conversion). Useful for chaining transformations on the output.

Value To Check number

💡 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]

🔗 Result Handling — Chain Variables

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

isUnixTimestamp()

+ Chain another variable

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Related Variables

Same category: Condition

→ isArray → isDefined → isEmpty → isEmptyString → isEqualTo → isFalsy → isFunction → isGreaterThan → isGreaterThanOrEqualTo → isInRange → isInfinity → isInteger → isJSON → isLessThan → isLessThanOrEqualTo → isNaN → isNotArray → isNotEmptyString → isNotFunction → isNotJSON → isNotNaN → isNotNull → isNotNumber → isNotObject → isNotString → isNotURL → isNull → isNumber → isObject → isPrimitive → isSHA256 → isString → isStringifiedNumber → isTruthy → isURL → isUndefined → isUnixTimestampMilliseconds → isUnixTimestampSeconds → isValidNumber

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Under the Hood

📜 View Implementation Code

/**
 * Checks if the provided input is a valid Unix timestamp.
 * 
 * @param {any} data.src - The input value to check (could be a string or number).
 * @param {Function|string} [data.out] - Optional output handler: function to transform result or string with format.
 *
 * Direct-mode specific parameters:
 * @param {Function} [data.pre] - Optional pre-processor function to transform `src` before checking.
 * 
 * @returns {boolean} True if the input is a valid Unix timestamp (seconds or milliseconds), false otherwise.
 *
 * @framework ggLowCodeGTMKit
 */
const makeInteger = require('makeInteger');
const makeNumber = require('makeNumber');
const isUnixTimestamp = function(value) {
  	if (value === null || value === "") { return false;}
	const valueNum = makeNumber(value);
	const valueInt = makeInteger(value);
	if (typeof valueInt === 'number' && valueNum === valueInt) {
		const isMilliseconds = valueInt >= 1000000000000 && valueInt <= 8640000000000; ; // Valid range for milliseconds
		const isSeconds = valueInt >= -2147483648 && valueInt <= 2147483647;  // Valid range for seconds
		return isMilliseconds || isSeconds;
	}
	return false;
};
const safeFunction = fn => typeof fn === 'function' ? fn : x => x;
const out = safeFunction(data.out);
// ===============================================================================
// isUnixTimestamp - Direct mode
// ===============================================================================
const applyCast = (castFn, value) => safeFunction(castFn)(value);
const value = applyCast(data.pre, data.src);
return out(isUnixTimestamp(value));
// ===============================================================================
// isUnixTimestamp() – Apply Mode
// ===============================================================================
/*
return function(value) {
   return out(isUnixTimestamp(value));
};
*/

🧪 View Test Scenarios (7 tests)

✅ '[example] Seconds timestamp'
✅ '[example] Milliseconds timestamp'
✅ String timestamp - should return true
✅ Decimal timestamp - should return false
✅ Too large timestamp - should return false
✅ Zero Timestamp - should return true
✅ Empty String - should return false