Method getFeatures

src/mapboxgl/overlay/theme/ThemeLayer.js:297–306

* @function ThemeLayer.prototype.getFeatures * @description 查看当前图层中的有效数据。 * @param {Function} [filter] - 根据条件过滤要素的回调函数。 * @returns {Array. } 用户加入图层的有效数据。

(filter)

     * @returns {Array.<FeatureVector>} 用户加入图层的有效数据。
     */
    getFeatures(filter) {
      var len = this.features.length;
      var clonedFeatures = [];
      for (var i = 0; i < len; ++i) {
        if (!filter || (filter && typeof filter === 'function' && filter(this.features[i]))) {
          clonedFeatures.push(this.features[i]);
        }
      }
      return clonedFeatures;
    }

    /**
     * @function ThemeLayer.prototype.getFeatureBy