OptinMonster Dynamic Text Replacement API - hasCustomVariable

hascustomvariable.js

<script type="text/javascript">
	var OptinMonsterCustomVariables = function(app) {
		/**
		 * API method for checking if a custom variable has been registered. 
		 * Must be accessed via the app object.
		 * 
		 * @param string $key The custom variable key to check.
		 * @return bool       True if the custom variable exists, false otherwise.
		 */
		app.hasCustomVariable('foo');
	};
</script>