未捕获的类型错误：无法读取 null 的属性（读取“addEventListener”）。 该怎么办？

Question

I'm designing a quiz app, but while console logging for a click event, this statement showed up on the console. Code -

startButton.addEventListener("click", function startGame() {
  console.log("started");
});

what should i do to show the statement on my console???

Answer 1

If you get this error it means that your start button is null. 2 possibilities:

1. Your selector for startButton is incorrect. So you have to adjust your selector.

2. Your selector is correct but your button is not in the DOM yet. So you have a problem with timing. Try to add the eventlistener at the end of your code