28 lines
921 B
JavaScript
28 lines
921 B
JavaScript
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"use strict";
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var functionName = require("./function-name");
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/**
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* Returns a display name for a value from a constructor
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*
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* @param {object} value A value to examine
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* @returns {(string|null)} A string or null
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*/
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function className(value) {
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return (
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(value.constructor && value.constructor.name) ||
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// The next branch is for IE11 support only:
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// Because the name property is not set on the prototype
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// of the Function object, we finally try to grab the
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// name from its definition. This will never be reached
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// in node, so we are not able to test this properly.
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// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name
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(typeof value.constructor === "function" &&
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/* istanbul ignore next */
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functionName(value.constructor)) ||
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null
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);
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}
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module.exports = className;
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