ValidityState: rangeOverflow property

{{APIRef("HTML DOM")}}

The read-only rangeOverflow property of the ValidityState interface indicates if the value of an {{HTMLElement("input")}} , after having been edited by the user, does not conform to the constraints set by the element’s max attribute.

If the field is numeric in nature, including the {{HTMLElement("input/date", "date")}} , {{HTMLElement("input/month", "month")}} , {{HTMLElement("input/week", "week")}} , {{HTMLElement("input/time", "time")}} , {{HTMLElement("input/datetime-local", "datetime-local")}} , {{HTMLElement("input/number", "number")}} and {{HTMLElement("input/range", "range")}} types and a max value is set, if the value doesn’t conform to the constraints set by the max value, the rangeOverflow property will be true.

Value

A boolean that is true if the ValidityState does not conform to the constraints.

Examples

Input with numeric overflow

The following example checks the validity of a numeric input element. A constraint has been added using the max attribute which sets a maximum value of 18 for the input. If the user enters a number higher than 18, the element fails constraint validation, and the styles matching {{cssxref(":invalid")}} and {{cssxref(":out-of-range")}} CSS pseudo-classes

/* or :invalid */
input:out-of-range {
  outline: red solid 3px;
}

body {
  margin: 0.5rem;
}
pre {
  padding: 1rem;
  height: 2rem;
  background-color: lightgrey;
  outline: 1px solid grey;
}

<pre id="log">Validation logged here...</pre>
<input type="number" id="age" max="18" />

const userInput = document.getElementById("age");
const logElement = document.getElementById("log");

function log(text) {
  logElement.innerText = text;
}

userInput.addEventListener("input", () => {
  userInput.reportValidity();
  if (userInput.validity.rangeOverflow) {
    log("Number is too high!");
  } else {
    log("Input is valid…");
  }
});

{{EmbedLiveSample("input_with_numeric_overflow", "100%", "140")}}

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}

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