$('#upload-input').on('change', function () {

    var files = $(this).get(0).files;

    if (files.length > 0) {
        // One or more files selected, process the file upload
        var form = new FormData();

        for (var index = 0; index < files.length; index++) {

            var file = files[index];
            form.append('Uploded Files', file, file.name);
        }

        $.ajax({
            url: 'api/fileupload/upload',
            type: 'POST',
            data: form,
            processData: false,
            contentType: false,
            success: function (data) {
                console.log('upload successful!');
            }
        });
    }

});

FileUpload.remoteMethod

(
        'upload', {
            http: {
                verb: 'post',
            },
            accepts:
            [
                { arg: 'ctx', type: 'object', http: { source: 'context' } },
                { arg: 'options', type: 'object', http: { source: 'query' } }

            ],
            returns: {
                arg: 'data',
                type: 'string',
                root: true
            }
        }
    );

    FileUpload.upload = function (context, options, callback) {
        //context.req.params = 'common';


    };

npm install --save multer

var multer = require('multer');
var fs = require('fs');

module.exports = function (MyModel) {
    var uploadedFileName = '';
    var storage = multer.diskStorage({
        destination: function (req, file, cb) {
            // checking and creating uploads folder where files will be uploaded
            var dirPath = 'client/uploads/'
            if (!fs.existsSync(dirPath)) {
                var dir = fs.mkdirSync(dirPath);
            }
            cb(null, dirPath + '/');
        },
        filename: function (req, file, cb) {
            // file will be accessible in `file` variable
            var ext = file.originalname.substring(file.originalname.lastIndexOf("."));
            var fileName = Date.now() + ext;
            uploadedFileName = fileName;
            cb(null, fileName);
        }
    });


    MyModel.upload = function (req, res, cb) {
        var upload = multer({
            storage: storage
        }).array('file', 12);
        upload(req, res, function (err) {
            if (err) {
                // An error occurred when uploading
                res.json(err);
            }
            res.json(uploadedFileName);
        });
    };

    MyModel.remoteMethod('upload',   {
        accepts: [{
            arg: 'req',
            type: 'object',
            http: {
                source: 'req'
            }
        }, {
            arg: 'res',
            type: 'object',
            http: {
                source: 'res'
            }
        }],
        returns: {
             arg: 'result',
             type: 'string'
        }
    });
};

FileUpload.remoteMethod(
    'upload', {
        http: {
            verb: 'post',
        },
        accepts:
        [{
            arg: 'req',
            type: 'object',
            http: {
                source: 'req'
            }
        }, {
            arg: 'res',
            type: 'object',
            http: {
                source: 'res'
            }
        }],
        returns: {
            arg: 'data',
            type: 'string',
            root: true
        }
    }
);



var uploadedFileName = '';

var storage = multer.diskStorage({
    destination: function (req, file, cb) {
        // checking and creating uploads folder where files will be uploaded
        var dirPath = 'client/uploads/'
        if (!fs.existsSync(dirPath)) {
            var dir = fs.mkdirSync(dirPath);
        }
        cb(null, dirPath + '/');
    },
    filename: function (req, file, cb) {
        // file will be accessible in `file` variable
        console.log("----------Second Rakesh---");
        console.log(file);
        var ext = file.originalname.substring(file.originalname.lastIndexOf("."));
        var fileName = Date.now() + ext;
        uploadedFileName = fileName;
        cb(null, fileName);
    }
});






FileUpload.upload = function (req, res, callback) {

    var upload = multer({
        storage: storage
    }).array('file', 12);

    upload(req, res, function (err) {
        if (err) {
            // An error occurred when uploading
            res.json(err);
        }
        console.log("-------------Rakesh"); // Its Printing Rakesh

        res.json(uploadedFileName);
    });
};

$ lb datasource
[?] Enter the data-source name: myfilesystem
[?] Select the connector for myfilesystem: other
[?] Enter the connector name: loopback-component-storage
[?] Install storage (Y/n)