use AWS in class

export class ImportFilePage {

  constructor() { }

    fileEvent(fileInput: any){
       
        var AWSService = window.AWS;

        var file = fileInput.target.files[0];

        AWSService.config.accessKeyId = 'SpongeBob';

        AWSService.config.secretAccessKey = 'Power';

        var bucket = new AWSService.S3({params: {Bucket: 'Ice'}});

        var params = {Key: file.name, Body: file};

        bucket.upload(params, function (err, data) {

            console.log(err, data);

        });   
    }

}