jQuery plug-in provides a good way to save time and simplify the development, programmers don't need to write each component from scratch. However, the plug-in will also be a destabilizing factor in your code library. A plug-in saves countless development time, but a poor quality plug-in will cost more than the actual time to write your own component from scratch.Luckily, usually you have many pls to choose from, but even if you have only one plug-in, you also need to know whether it's worth using or not, don't ever introduce wrong codes into your code library.Do you need a plug-in?First you n...