Display the width of a URL field in number of characters:
var x = document.getElementById("myURL").size;
Click the button to display the value of the size attribute of the URL field.
elements with type="url" are not supported in Safari.
<!DOCTYPE html> <html> <body> Homepage: <input type="url" id="myURL" size="30"> <button onclick="myFunction()">Test</button> <p id="demo"></p> <script> function myFunction() {/*from ww w . j a v a 2s .co m*/ var x = document.getElementById("myURL").size; document.getElementById("demo").innerHTML = x; } </script> </body> </html>