|#1 https://github.com/nchand/BarCodeGenerator/issues/1 <br> #2 https://github.com/Swap76/Learn-JavaScript/issues/23 <br> #3 https://github.com/Swap76/Learn-JavaScript/issues/263 <br> #4 https://github.com/Swap76/Learn-JavaScript/issues/271|#1 https://github.com/nchand/BarCodeGenerator/pull/2<br>#2 <br>#3 <br>#4|#1 https://ychoi63.blogspot.com/2019/10/osd600-lab04-first-pull-request.html<br>#2 <br>#3 <br>#4