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