You can look up the current or previous developer and reach out. They provide significant insights into the company that might be helpful during the interview. It would help if you were cautious with this approach because there is a thin line between seeking insights and being invasive. Consider other essential website resources that review the company for information if the current developer approach does not work.
It is common for web developers to be requested to code on either a whiteboard or a piece of paper during the interview. Set aside enough time to practice well before the interview. It is human nature to polish up their strong areas as they prepare for interviews. Remember to give adequate attention to your weak areas. Try coding in unfamiliar areas. Most interviewers are interested in the coding skills, so extra knowledge and practice go a long way in creating a good impression.
Interviews are overwhelming, and we often get anxious and intimidated easily. Work on your confidence before the set date. For example, you can find sample questions from the internet and practice with out of your colleagues. He or she can play the role of the interviewer. Let them focus on your weak areas with the questions. It does not have to be obvious what questions they should ask. This will eliminate the jitters and boost your confidence.