Sorry for the ambiguous title, I just didn't know what else to put. Im learning JS and in the video the person does this.
When he calls the addListAfterKeyPress method at the bottom, why does the function call work? I thought he would have to put in a argument for the addListAfterKeyPress to take in since it has an event parameter. But in the end the code works perfectly. And also, when can i call a function that takes a parameter without explicitly passing one like how he did it in the picture?