The HTML DOM Input Text maxLength property is used for setting or returning the maxlength attribute of the input text field. The maxLength property specifies the maximum number of characters you can type in a text field.
Syntax
Following is the syntax for −
Setting the maxLength property −
textObject.maxLength = integer
Here, integer specifies the maximum number of characters that can be typed in the text field.
Example
Let us look at an example for the maxLength property −
<!DOCTYPE html>
<html>
<body>
<h1>Input Text maxLength Property</h1>
USERNAME: <input type="text" id="USR" maxLength="5">
<p>Increase the maximum number of characters to be entered for the above field by clicking below button</p>
<button onclick="changeMax()">CHANGE LENGTH</button>
<p id="Sample"></p>
<script>
function changeMax() {
document.getElementById("USR").maxLength = "15";
document.getElementById("Sample").innerHTML = "Maximum number of characters are now increased to 15";
}
</script>
</body>
</html>Output
This will produce the following output. Only 5 characters are allowed since we have set maxLength 5 −
On clicking the CHANGE LENGTH button −
