你即將離開本站

並前往https://stackoverflow.com/questions/52872503/how-can-i-tell-if-an-input-type-number-is-blank-vs-has-an-invalid-value

How can I tell if an is blank vs. has an ...

From here you can study all validity states ( valueMissing , badInput , etc...) You can get a reference to your input using document.

確定！ 回上一頁

查詢 「Badinput」的人也找了：

  1. Validity typemismatch
    2.
  2. patternMismatch
    3.
  3. valueMissing
    4.
  4. Rangeoverflow
    5.
  5. setCustomValidity
    6.
  6. Input validity
    7.
  7. jQuery setCustomValidity
    8.
  8. HTML5 validation
    9.