isURL — GTM Variable Template for Condition

VARIABLES › CONDITION

isURL EXTENDED Condition

Direct (.tpl) Apply (.tpl)

Checks if the provided value is valid URL.

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Examples

Valid URL returns true

INPUT

Value To Check: https://www.example.com

OUTPUT

true

Invalid URL returns false

INPUT

Value To Check: not a url

OUTPUT

false

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GTM Configuration

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Read-only Preview

isURL

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.

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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 → isUndefined → isUnixTimestamp → isUnixTimestampMilliseconds → isUnixTimestampSeconds → isValidNumber

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Under the Hood

📜 View Implementation Code

/**
 * Checks if the provided value is a <em>URL</em>.
 * 
 * @param {any} data.src - The value to check.
 * @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 value is a URL, false otherwise.
 *
 * @framework ggLowCodeGTMKit
 */
const parseUrl = require('parseUrl');
const isURL = function(value) {
	return parseUrl(value) !== undefined;
};
const safeFunction = fn => typeof fn === 'function' ? fn : x => x;
const out = safeFunction(data.out);
// ===============================================================================
// isURL - Direct mode
// ===============================================================================
const applyCast = (castFn, value) => safeFunction(castFn)(value);
const value = applyCast(data.pre, data.src);
return out(isURL(value));
// ===============================================================================
// isURL() – Apply Mode
// ===============================================================================
/*
return function(value) {
   return out(isURL(value));
};
*/

🧪 View Test Scenarios (5 tests)

✅ '[example] Valid URL returns true'
✅ Valid HTTP URL with path - should return true
✅ '[example] Invalid URL returns false'
✅ Malformed URL are considered as URL - should return true
✅ Number - should return false