This app provides monitoring and information features for the common freifunk user and the technical stuff of a freifunk community.
Code base is taken from a TUM Practical Course project and added here to see if Freifunk Altdorf can use it.
https://www.freifunk-altdorf.de
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27 lines
773 B
27 lines
773 B
'use strict'; |
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var toStr = Object.prototype.toString; |
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var hasSymbols = typeof Symbol === 'function' && typeof Symbol() === 'symbol'; |
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if (hasSymbols) { |
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var symToStr = Symbol.prototype.toString; |
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var symStringRegex = /^Symbol\(.*\)$/; |
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var isSymbolObject = function isSymbolObject(value) { |
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if (typeof value.valueOf() !== 'symbol') { return false; } |
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return symStringRegex.test(symToStr.call(value)); |
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}; |
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module.exports = function isSymbol(value) { |
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if (typeof value === 'symbol') { return true; } |
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if (toStr.call(value) !== '[object Symbol]') { return false; } |
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try { |
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return isSymbolObject(value); |
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} catch (e) { |
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return false; |
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} |
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}; |
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} else { |
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module.exports = function isSymbol(value) { |
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// this environment does not support Symbols. |
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return false; |
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}; |
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}
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