12 lines
350 B
JavaScript
12 lines
350 B
JavaScript
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"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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