TypeError: Cannot read properties of null (reading 'document'): function () { [native code] }

[Renu9]

Hi All,

I am using an onsubmit client script like below, which is throwing the below error in native UI when I am making any updates to the record.

Please help me here what is wrong

TypeError: Cannot read properties of null (reading 'document'):
function () { [native code] }

function onSubmit() {

    //portal

    var countRequired = 2;

    if (window == null) {

        if (this.document.getElementsByClassName('get-attachment').length != 2) {

            g_form.addErrorMessage("Please add at least one attachment.");

            return false;

        }

    }

    //native

    else {

        var count = getCurrentAttachmentNumber(); // this function is out of the box

        if (count != 2) {

            g_form.addErrorMessage('You must add an attachment');

            return false;

        }

    }

}

[Brad Bowman]

It seems like the error is caused by the this.document... line, even though it shouldn't be running that in the native UI due to the window == null condition.  Confirm that Isolate script is unchecked, and the UI Type = All. An alternate method of identifying when portal is being used is

if (typeof parent.angular != 'undefined') { // portal

[Renu9]

Hi @Brad Bowman  

yes isolate script is unchecked and ui type is set to all already 

now i have added the alternate method of identifying portal but still it is throwing the same error in native view

[Brad Bowman]

If you comment only the if line containing this.document, and the closing } does it run without error?  If so, do you get the text of the portal or native ErrorMessage - or both?