69 lines
1.4 KiB
JavaScript
69 lines
1.4 KiB
JavaScript
/*!
|
|
* is-accessor-descriptor <https://github.com/jonschlinkert/is-accessor-descriptor>
|
|
*
|
|
* Copyright (c) 2015-2017, Jon Schlinkert.
|
|
* Released under the MIT License.
|
|
*/
|
|
|
|
'use strict';
|
|
|
|
var typeOf = require('kind-of');
|
|
|
|
// accessor descriptor properties
|
|
var accessor = {
|
|
get: 'function',
|
|
set: 'function',
|
|
configurable: 'boolean',
|
|
enumerable: 'boolean'
|
|
};
|
|
|
|
function isAccessorDescriptor(obj, prop) {
|
|
if (typeof prop === 'string') {
|
|
var val = Object.getOwnPropertyDescriptor(obj, prop);
|
|
return typeof val !== 'undefined';
|
|
}
|
|
|
|
if (typeOf(obj) !== 'object') {
|
|
return false;
|
|
}
|
|
|
|
if (has(obj, 'value') || has(obj, 'writable')) {
|
|
return false;
|
|
}
|
|
|
|
if (!has(obj, 'get') || typeof obj.get !== 'function') {
|
|
return false;
|
|
}
|
|
|
|
// tldr: it's valid to have "set" be undefined
|
|
// "set" might be undefined if `Object.getOwnPropertyDescriptor`
|
|
// was used to get the value, and only `get` was defined by the user
|
|
if (has(obj, 'set') && typeof obj[key] !== 'function' && typeof obj[key] !== 'undefined') {
|
|
return false;
|
|
}
|
|
|
|
for (var key in obj) {
|
|
if (!accessor.hasOwnProperty(key)) {
|
|
continue;
|
|
}
|
|
|
|
if (typeOf(obj[key]) === accessor[key]) {
|
|
continue;
|
|
}
|
|
|
|
if (typeof obj[key] !== 'undefined') {
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
function has(obj, key) {
|
|
return {}.hasOwnProperty.call(obj, key);
|
|
}
|
|
|
|
/**
|
|
* Expose `isAccessorDescriptor`
|
|
*/
|
|
|
|
module.exports = isAccessorDescriptor;
|