[Solved]the difference between "document.getElementsByTagName('iframe')" and "document.parentwindow.frames"?

[Letraindusoir]

$tFrame = $oIexp.document.getElementsByTagName('iframe').item(0)

$oFrame = $oIexp.document.parentwindow.frames.item(0)

As shown above,

$tFrame and $oFrame,

what is the difference between the two Frames objects obtained by the two methods?

Because problems are found during use:

1 、$tFrame.attributes() can work

1 、$oFrame.attributes() can not work

So some doubts, hope to understand more clearly.

Thanks in advance!

Edited March 12, 2020 by Letraindusoir

[Danyfirex]

Hello,

 $oIexp.document.getElementsByTagName('iframe').item(0)  returns HTMLFrameElement object
 $oIexp.document.parentwindow.frames.item(0) returns HTMLWindow2 object

 

Saludos

 

[Danyfirex]

Hello,

 $oIexp.document.getElementsByTagName('iframe').item(0)  returns HTMLFrameElement object
 $oIexp.document.parentwindow.frames.item(0) returns HTMLWindow2 object

 

Saludos

 

[junkew]

It are just different objects with different methods

https://www.w3schools.com/jsref/met_document_getelementsbytagname.asp

The getElementsByTagName() method returns a collection of all elements in the document with the specified tag name, as an HTMLCollection object

 

[Nine]

To add a bit more precision :

$oIexp.document.parentwindow.frames.item (0) is the same thing as $oIexp.document.getElementsByTagName('iframe').item(0).contentWindow

[Letraindusoir]

Thank all masters  for the help!

I seem to understand what's going on.....

$tForm =$oIexp.document.getElementsByTagName('form').item(0)

$oForm = $oIexp.document.forms.item(0)

The above seems to be equivalent object. No errors were found in use.

but

$tFrame = $oIexp.document.getElementsByTagName('iframe').item(0)

$oFrame = $oIexp.document.parentwindow.frames.item(0)

those are different types of objects, so there are errors

Edited March 7, 2020 by Letraindusoir