[js][插件] 简单检测ajax返回的错误数据

            var QM = (function() {
                /**
                 * 检测错误数据
                 * @author qingming
                 */
                var dataResult;
                var exports = {};

                function stringDetect(str) {
                    //console.log('str',str);
                    var errorData = ['null', 'false', 'error', '0', 'undefined', 'NaN', '[]', '{}', ''];
                    for (var i = 0; i < errorData.length; i++) {
                        if (str === errorData[i]) {
                            return false;
                        }
                    }
                    return str;
                    //不考虑兼容性的简洁写法
                    //return errorData.some(e => e === str) ? false : str;
                }

                function objectDetect(obj) {
                    //console.log('obj',obj);
                    if (obj === null || (obj instanceof Array && obj.length === 0) || (Object.prototype.isPrototypeOf(obj) && Object.keys(obj).length === 0)) {
                        return false;
                    } else {
                        return obj;
                    }
                }
                exports.error_detect = function(data) {
                    //console.log('in',data);
                    switch (typeof data) {
                        case 'string':
                            dataResult = stringDetect(data);
                            break;
                        case 'object':
                            dataResult = objectDetect(data);
                            break;
                        default:
                            dataResult = data;
                    }
                    return dataResult;
                }
                return exports;
            })();
//            console.log(QM.error_detect('xxyy'));
//            console.log(QM.error_detect('null'));
//            console.log(QM.error_detect('0'));
//            console.log(QM.error_detect('false'));
//            console.log(QM.error_detect('error'));
//            console.log(QM.error_detect(null));
//            console.log(QM.error_detect([]));
//            console.log(QM.error_detect({}));
//            console.log(QM.error_detect([0, 1, 2]));
//            console.log(QM.error_detect({'you': 'de',hao: 'de'}));
//            console.log(QM.error_detect(NaN));
//            console.log(QM.error_detect(false));
//            console.log(QM.error_detect(0));