你即將離開本站

並前往https://askto.pro/question/why-cannot-read-property-classlist-of-undefined

Why Cannot read property 'classList' of undefined? - Askto.pro

The class is added and removed normally, but the console displays the error “Cannot read property 'classList' of undefined”

確定！ 回上一頁

查詢 「classList undefined」的人也找了：

  1. classList undefined
    2.
  2. Cannot read property 'classList' of undefined
    3.
  3. classList jQuery
    4.
  4. classList toggle show
    5.
  5. JavaScript class contains
    6.
  6. classList add
    7.
  7. getElementsByClassName classlist
    8.
  8. Uncaught typeerror cannot read properties of null reading classlist
    9.