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11 lines
350 B
11 lines
350 B
"use strict"; |
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var isClassStr = RegExp.prototype.test.bind(/^\s*class[\s{/}]/) |
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, fnToString = Function.prototype.toString; |
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module.exports = function (fn) { |
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if (typeof fn !== "function") return false; |
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if (typeof fn.call !== "function") return false; |
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if (typeof fn.apply !== "function") return false; |
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return !isClassStr(fnToString.call(fn)); |
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};
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