元素未完全与底部对齐； 略低于底边

Question

When using absolute positioning on an element within a div with a relative position rule, the element is slightly lower than the bottom of the parent div. Why does this happen? How would I solve this? I realize I can just mod the bottom value on .hoverAction, but that seems more like a workaround than an actual fix.

 function showFileUploadDialog() { //do stuff } 

 #avatarContainer { display: inline-block; position: relative; } .hoverAction { position: absolute; bottom: 0; background: rgba(0, 0, 0, 0.65); color: white; display: block; width: calc(100% - 12px); padding: 6px; } #avatar { width: 200px; height: 180px; background-size: cover; background-position: center; border-radius: 1px; background-color: #eeeeee; box-shadow: 0 1px 5px rgba(0, 0, 0, 0.46); display: inline-block; } 

 <div id="avatarContainer"> <a class="popup-link" href="{{ anime.poster }}"><img id="avatar" style="background-image: url('http://www.herdofsquirrels.com/wp-content/uploads/2014/08/squirrel-nut-cute-animal-nature-grass-1920x1280.jpg');" /></a> <a class="hoverAction" href="#" onclick="showFileUploadDialog(); return false;">Update Avatar</a> </div> 

http://jsfiddle.net/pcwhmft6/1/

Answer 1

Add vertical-align: top; top your img

#avatar {
    vertical-align: top;
}

http://jsfiddle.net/pcwhmft6/2/

or set your image to display: block (Thanks @Justin Breiland for noticing)