如下所示的程式碼中，我定義了一些常數。我想使用Symbol來確保每個常數都是唯一的。但是當我使用以下程式碼行時：
if (isBtnDigitizePolygonClicked.value == true) {
return polygDigiConstants.CONST_STRING_DIGITIZE;
}
上述程式碼回傳的值是Symbol('Digitize')，但我期望它是Digitize，如本教學所述：https://www. scaler.com/topics/enum-in-javascript/
#教學內容：
#const Direction = Object.freeze({
North: Symbol('north'),
East: Symbol('east'),
West: Symbol('west'),
South: Symbol('south'),
})
const Pole = Object.freeze({
North: Symbol('north'),
South: Symbol('south'),
})
console.log(Direction.North === Pole.North)
上述代码的输出为：
false
請告訴我如何正確使用Symbol來定義屬性。
polygDigiConstants.js
function define(name, value) {
Object.defineProperty(polygDigiConstants, name, {
value: value,
enumerable: true,
writable: false,
});
}
export let polygDigiConstants = {};
define('CONST_STRING_DIGITIZE', Symbol('Digitize'));
define('CONST_STRING_STOP_DIGITIZE', Symbol('Stop'));
define('CONST_STRING_CLEAR_DIGITIZED', Symbol('Clear')); 
polygDigiConstants.js
#function define(name, value) { Object.defineProperty(polygDigiConstants, name, { value: value, enumerable: true, writable: false, }); } export let polygDigiConstants = {}; define('CONST_STRING_DIGITIZE', Symbol('Digitize')); define('CONST_STRING_STOP_DIGITIZE', Symbol('Stop')); define('CONST_STRING_CLEAR_DIGITIZED', Symbol('Clear'));JS
import { polygDigiConstants } from './polygDigiConstants.js'; if (isBtnDigitizePolygonClicked.value == true) { return polygDigiConstants.CONST_STRING_DIGITIZE.description; // 这将给你 'Digitize' } function define(name, value) { Object.defineProperty(polygDigiConstants, name, { value: value, enumerable: true, writable: false, }); } export let polygDigiConstants = {}; define('CONST_STRING_DIGITIZE', 'Digitize'); define('CONST_STRING_STOP_DIGITIZE', 'Stop'); define('CONST_STRING_CLEAR_DIGITIZED', 'Clear');polygDigiConstants.CONST_STRING_DIGITIZE將直接給你字串'Digitize'。