how to give max length for multi line text in service portal?

[Aviram]

Hi,

I need to set limitation for variable type: multi line text and set the max character to 4,000.

[Nitesh Asthana1]

catalog item multiline text field? Or HTML text field?

[Aviram]

catalog item multiline text field

[Nitesh Asthana1]

Try below catalog client script,

function onChange(control, oldValue, newValue, isLoading) {

    if (isLoading || newValue == '') {

          return;

    }

    var multi = g_form.getValue('multi');

    var len = multi.length;

  if(len>4000){

  var str = multi.slice(0,4000);

  g_form.setValue('multi',str);

  alert('Length exceeded');

  }

}

[Aviram]

I didn't explain myself properly,

I don't want to allow enter more then 4,000 characters, so when the user enter the 4,000 character he can't type anymore.
Just like the Variable attributes max_lenght in Single Line Text.