validityState.tooLong - Web APIs 编辑

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The read-only tooLong property of a ValidityState object indicates if the value of an <input> or <textarea>, after having been edited by the user, exceeds the maximum code-unit length established by the element's maxlength attribute.

Specifications

Browser compatibility

BCD tables only load in the browser

See also

• Constraint validation
• Forms: Data form validation