html - How do I display an empty div tag with CSS? -

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how force empty div tag show? have add   in div show. there way force display using css?

<div class="bar bg-success" title="2015-07-23,5.0000" height="50%"></div>  .bar {   background: green;   width: 5px;   float: left;   position: relative; }

i tried adding

.bar:after {   content: " "; }

but didn't help.

fiddle: http://jsfiddle.net/cf0gprln/
bootply: http://www.bootply.com/tnjkapio7l

please ignore below answers saying set height in css. height has set dynamically. &nbsp; makes display.

sorry realize made mistake height style. i'm not sure thinking. however, still doesn't work with:

<div class="bar bg-success" title="2015-07-23,5.0000" style="height: 50%;"></div>

i see works in jsfiddle, not bootply. it's problem bootstrap. since question changed, i'll re-enter different question. updated bootply inline style: http://www.bootply.com/0apacbxmwp

it work! :) have add height well! :)

you can view updated fiddle here: http://jsfiddle.net/cf0gprln/1/

edit

i see added height html. reason not working because styling whole div. class on other hand kind of separate, , height , width both need defined there. either there, or in html self.


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