43 lines
988 B
Plaintext
43 lines
988 B
Plaintext
'use strict';
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var toString = Object.prototype.toString;
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/**
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* Extract names from functions.
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*
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* @param {Function} fn The function who's name we need to extract.
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* @returns {String} The name of the function.
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* @public
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*/
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module.exports = function name(fn) {
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if ('string' === typeof fn.displayName && fn.constructor.name) {
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return fn.displayName;
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} else if ('string' === typeof fn.name && fn.name) {
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return fn.name;
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}
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//
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// Check to see if the constructor has a name.
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//
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if (
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'object' === typeof fn
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&& fn.constructor
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&& 'string' === typeof fn.constructor.name
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) return fn.constructor.name;
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//
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// toString the given function and attempt to parse it out of it, or determine
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// the class.
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//
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var named = fn.toString()
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, type = toString.call(fn).slice(8, -1);
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if ('Function' === type) {
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named = named.substring(named.indexOf('(') + 1, named.indexOf(')'));
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} else {
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named = type;
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}
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return named || 'anonymous';
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};
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