css transitions - Why transform:translatex in this css class does not move the div sideway? -


i want move div across screen. div set width:100% initially. when transformation starts, size of div seems have shrinked (the blue border wraps around text). why case?

before

enter image description here

after

enter image description here

here code example

http://codepen.io/kongakong/pen/mkzmmm

javascript:

$(document).ready(function () {   init(); });  function init() {   $('input').on('click',     function () {       $('.answer-text-2').closest('.answer').addclass('textout');       $('.answer-hide').addclass('textin');     }); }

css

.row { }  .hidden {   display: none; }  .answer-text-2 {   color: red;   opacity: 1;   margin: auto; }  .answer-text-2-new {   color: blue;   opacity: 0;   margin: 500; }  .textout {   /* display: none; */   margin: -500;   opacity: 0;   width: '50%';   transition: 3s ease-in-out; }  .answer-hide {    border: 1px solid blue;    width: '100%'; } .textin {   position: absolute;   margin: 0;   left: 0;   transform: translatex(10000px);   transition: transform 5s ease-in-out; }

html

<div class="contrainer">   <div>     <input type='button' value="test"></input>   </div>    <div class="row">     <div class="answer">       <span class="answer-text-2">to disappear</span>     </div>     <div class="answer-hide">to move sideway      </div>   </div>  </div>

well... width of div called answer-hide set auto, , it's position set static (as default values). when applying transformation div's position automatically changed absolute (as defined in spec) , width:auto block elements positioned absolutely shrink fit. fix that, sure, width property set, because width: 100%; not equal width: '100%'; :)

.answer-hide {    border: 1px solid blue;    width: 100%; }

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