JS错误，看看里面

Question

/**
 * @const
 * @type {!storeLocator.FeatureSet}
 * @type {!storeLocator.FeatureSet}
 * @private
 */
MedicareDataSource.prototype.FEATURES_ = new storeLocator.FeatureSet(
    new storeLocator.Feature('Wheelchair-YES', 'Shoe1'),
    new storeLocator.Feature('Audio-YES', 'Shoe2')
);


/**
 * @return {!storeLocator.FeatureSet}
 */
MedicareDataSource.prototype.getFeatures = function() {
    return this.FEATURES_;
};

每次我在Audio-YES行之后添加一行代码，输出会在我的程序中消失？有什么问题？

Answer 1

您无法在new storeLocator.Feature('Audio-YES', 'Shoe2')之后立即添加代码。剧情： storeLocator.FeatureSet是构造函数，不在那里编写代码，传递参数，用逗号分隔。

Answer 2

也许您在插入新行之前忘记添加,：

MedicareDataSource.prototype.FEATURES_ = new storeLocator.FeatureSet(
    new storeLocator.Feature('Wheelchair-YES', 'Shoe1'),
    new storeLocator.Feature('Audio-YES', 'Shoe2'), // don't forget the comma
    new storeLocator.Feature('something', 'else')
);