Set the maximum number of characters allowed in a URL field:
document.getElementById("myURL").maxLength = "8";
Click the button to set the maximum number of characters allowed in the url field.
elements with type="url" are not supported in Safari.
<!DOCTYPE html> <html> <body> Homepage: <input type="url" id="myURL"> <button onclick="myFunction()">Test</button> <p id="demo"></p> <script> function myFunction() {/*from w w w.j a v a2 s . c om*/ document.getElementById("myURL").maxLength = "8"; document.getElementById("demo").innerHTML = "Maximum number of characters allowed in the url field is now 8."; } </script> </body> </html>