コードを編集:
結果を参照してください。 »
それを自分で試してみてください - ©
w3ii.com
<!DOCTYPE html> <html> <body> Address:<br> <textarea id="myTextarea"> </textarea> <p>Click the button to set the maximum number of characters allowed in the text area to "4".</p> <button onclick="myFunction()">Try it</button> <p id="demo"></p> <script> function myFunction() { document.getElementById("myTextarea").maxLength = "4"; document.getElementById("demo").innerHTML = "Maximum number of characters allowed in the text area is now 4."; } </script> </body> </html>