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Re: Clearing/Writing a daughter window ?

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JJ wrote:

> On Sat, 3 Aug 2019 10:46:30 -0700 (PDT), dr.j.r.stockton@gmail.com wrote:
>> Alternatively, is there a better way of loading sFileDat
>> into Wndw, maybe by assignment, so that any previous content
>> of Wndw is no longer there (and best, given explicitly
>> to the garbage collector)?
> 
> You should call the `document.close()` after you've finished using either
> `document.write()` or `document.writeln()`. Once `document.close()` is
> called, the next time you call `document.write()` or `document.writeln()`
> again, it will rewrite the whole page. i.e. the old page contents is
> discarded.

That document.write() implicitly calls document.open() is only standardized 
since HTML5.

The safe way is to call

  child_window.document.open();

before document.write() explicitly.

Note however, that this is the crude, outdated way to reset the entire 
contents of a window; for backwards compatibility, you will have to
restore the *entire* document, including the HEAD element.

Since the MSHTML and W3C DOMs, there is

  document.body.textContent = '';

or

  var body = document.body;
  var last_child;
  while ((last_child = body.lastChild)) body.removeChild(last_child);

or its MSHTML and W3C DOM Working Draft variant

  document.body.innerHTML = '';

instead.  The latter is probably the only reasonable use for the as-yet 
proprietary “innerHTML” property if none of the previous variants can be 
used.
 
> Keep in mind though... That, this only applies to HTML elements. It won't
> apply to any previously declared JavaScript variables and functions. If
> you want a truly fresh page, navigate the window via its window object.

If none of the above approaches suffice, it should be easier to call

  child_window.location.reload(true);

-- 
PointedEars
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Clearing/Writing a daughter window ? dr.j.r.stockton@gmail.com - 2019-08-03 10:46 -0700
  Re: Clearing/Writing a daughter window ? "R.Wieser" <address@not.available> - 2019-08-04 09:47 +0200
  Re: Clearing/Writing a daughter window ? JJ <jj4public@vfemail.net> - 2019-08-06 00:32 +0700
    Re: Clearing/Writing a daughter window ? dr.j.r.stockton@gmail.com - 2019-08-06 04:13 -0700
      Re: Clearing/Writing a daughter window ? JJ <jj4public@vfemail.net> - 2019-08-07 21:27 +0700
    Re: Clearing/Writing a daughter window ? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2019-08-08 15:00 +0200

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