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30 lines
818 B
JavaScript
30 lines
818 B
JavaScript
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"use strict";
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/**
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* Returns a display name for a function
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*
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* @param {Function} func
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* @returns {string}
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*/
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module.exports = function functionName(func) {
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if (!func) {
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return "";
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}
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try {
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return (
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func.displayName ||
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func.name ||
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// Use function decomposition as a last resort to get function
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// name. Does not rely on function decomposition to work - if it
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// doesn't debugging will be slightly less informative
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// (i.e. toString will say 'spy' rather than 'myFunc').
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(String(func).match(/function ([^\s(]+)/) || [])[1]
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);
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} catch (e) {
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// Stringify may fail and we might get an exception, as a last-last
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// resort fall back to empty string.
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return "";
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}
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};
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