source: imaps-frontend/node_modules/functions-have-names/index.js

'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;