node_modules/locutus/php/funchand/function_exists.js


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'use strict';

module.exports = function function_exists(funcName) {
  // eslint-disable-line camelcase
  //  discuss at: http://locutus.io/php/function_exists/
  // original by: Kevin van Zonneveld (http://kvz.io)
  // improved by: Steve Clay
  // improved by: Legaev Andrey
  // improved by: Brett Zamir (http://brett-zamir.me)
  //   example 1: function_exists('isFinite')
  //   returns 1: true
  //        test: skip-1

  var $global = typeof window !== 'undefined' ? window : global;

  if (typeof funcName === 'string') {
    funcName = $global[funcName];
  }

  return typeof funcName === 'function';
};
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