23 lines
588 B
JavaScript
23 lines
588 B
JavaScript
'use strict';
|
|
|
|
var $defineProperty = require('es-define-property');
|
|
|
|
var hasPropertyDescriptors = function hasPropertyDescriptors() {
|
|
return !!$defineProperty;
|
|
};
|
|
|
|
hasPropertyDescriptors.hasArrayLengthDefineBug = function hasArrayLengthDefineBug() {
|
|
// node v0.6 has a bug where array lengths can be Set but not Defined
|
|
if (!$defineProperty) {
|
|
return null;
|
|
}
|
|
try {
|
|
return $defineProperty([], 'length', { value: 1 }).length !== 1;
|
|
} catch (e) {
|
|
// In Firefox 4-22, defining length on an array throws an exception.
|
|
return true;
|
|
}
|
|
};
|
|
|
|
module.exports = hasPropertyDescriptors;
|