Constnium/node_modules/functions-have-names/index.js

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JavaScript
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2022-06-23 02:27:43 +02:00
'use strict';
var functionsHaveNames = function functionsHaveNames() {
return typeof function f() {}.name === 'string';
};
var gOPD = Object.getOwnPropertyDescriptor;
if (gOPD) {
try {
gOPD([], 'length');
} catch (e) {
// IE 8 has a broken gOPD
gOPD = null;
}
}
functionsHaveNames.functionsHaveConfigurableNames = function functionsHaveConfigurableNames() {
if (!functionsHaveNames() || !gOPD) {
return false;
}
var desc = gOPD(function () {}, 'name');
return !!desc && !!desc.configurable;
};
var $bind = Function.prototype.bind;
functionsHaveNames.boundFunctionsHaveNames = function boundFunctionsHaveNames() {
return functionsHaveNames() && typeof $bind === 'function' && function f() {}.bind().name !== '';
};
module.exports = functionsHaveNames;