- Other devs in the team are using it
- Unless it's a small pet project, you will probably need it down the road even if you don't need it now
- Minified jquery is like 32kb. That means literally nothing in modern web. Unless you are from 1995 using 2G connection, this doesn't matter.
- Modern browsers are good. It's going to handle jquery like a champ. Don't worry.
- jQuery code is probably better than yours.
- Lots of 3rd party libraries have jquery as a dependancy.
Reasons not to use jquery and use just javascript
- Want to learn javascript
- Writing a library or framework and you don't want jquery dependancy
- Working on a very small website