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Groups > comp.lang.javascript > #25273

Re: Element visible

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2014-07-10 10:15, Evertjan. wrote:

> Do you have a javascript related Q?

I have not had difficulties with understanding the question or with 
seeing it as being on-topic. The question was about ways to know if an 
element could be visible, and it seems obvious, in the context of this 
group, that it meant to ask how to test such a thing in JavaScript. 
Basically, how could you write a JavaScript function that takes an 
element node as argument and returns true or false depending on whether 
the element is visible or not.

The main problem with the question is that it is too vague. What is 
“visible” in this context. You already made some good points about this. 
Apparently some of the conditions for being visible, in some sense, are 
things you cannot test in JavaScript, like the user being blind. But 
many things, like the position of the element, its dimensions, and CSS 
styles and HTML attributes that apply to it, can be tested, to some 
extent at least.

Instead of theoretical discussions about such aspects and detailed 
treatment of how some specific things affecting visibility might be 
tested, maybe the OP should clarify what he is trying to accomplish. 
Some sample code, preferably with a link to an online demo, would 
greatly help in understanding what the practical problem is.

-- 
Yucca, http://www.cs.tut.fi/~jkorpela/

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Thread

Element visible Andrew Poulos <ap_prog@hotmail.com> - 2014-07-09 10:09 +1000
  Re: Element visible Andrew Poulos <ap_prog@hotmail.com> - 2014-07-09 13:32 +1000
    Re: Element visible "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2014-07-09 09:54 +0200
    Re: Element visible Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-07-09 11:18 +0200
      Re: Element visible Andrew Poulos <ap_prog@hotmail.com> - 2014-07-09 23:17 +1000
        Re: Element visible John Harris <niam@jghnorth.org.uk.invalid> - 2014-07-09 16:08 +0100
      Re: Element visible Andrew Poulos <ap_prog@hotmail.com> - 2014-07-10 10:07 +1000
        Re: Element visible "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2014-07-10 09:15 +0200
          Re: Element visible "Jukka K. Korpela" <jkorpela@cs.tut.fi> - 2014-07-10 10:45 +0300
            Re: Element visible Andrew Poulos <ap_prog@hotmail.com> - 2014-07-10 22:13 +1000
              Re: Element visible "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2014-07-10 14:31 +0200
                Re: Element visible Scott Sauyet <scott.sauyet@gmail.com> - 2014-07-10 13:35 -0700
                Re: Element visible "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2014-07-11 00:23 +0200
                Re: Element visible Scott Sauyet <scott.sauyet@gmail.com> - 2014-07-12 20:09 -0700
                Re: Element visible "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2014-07-13 09:07 +0200
          Re: Element visible John Harris <niam@jghnorth.org.uk.invalid> - 2014-07-10 10:46 +0100
        Re: Element visible Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-07-10 12:10 +0200
          Re: Element visible Andrew Poulos <ap_prog@hotmail.com> - 2014-07-14 13:00 +1000
          Re: Element visible Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-07-15 15:08 +0200

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