9 lines
233 B
JavaScript
9 lines
233 B
JavaScript
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'use strict';
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module.exports = function (fn) {
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if (typeof fn !== 'function') {
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throw new TypeError('Expected a function');
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}
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return fn.displayName || fn.name || (/function ([^\(]+)?\(/.exec(fn.toString()) || [])[1] || null;
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};
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