你即將離開本站

並前往https://masteringjs.io/tutorials/fundamentals/null

`null` in JavaScript - Mastering JS

The primary difference is purely semantic: undefined means the variable has not been assigned a value yet, whereas null means the variable has ...

確定！ 回上一頁

查詢 「Js undefined == null」的人也找了：

  1. js undefined判斷
    2.
  2. javascript null undefined判斷
    3.
  3. js null判斷
    4.
  4. JavaScript undefined null
    5.
  5. JavaScript undefined
    6.
  6. JavaScript null check
    7.
  7. JS null
    8.
  8. JavaScript null or undefined
    9.