javascript - Rotate a SVG hamburger icon into an X? -


i've designed 3-bar icon using pure svg code in html. i'm using css3 transforms rotate top & bottom bars x shape. problem rotate around own center, need them rotating around icon's center. around i've adjusted x/y coordinates.

this causes lot of buggy issues internet explorer, firefox, & safari. chrome seems alright i'd code "right" way it'll work in browsers.

here's live codepen

html

<svg id="burgericon" xmlns="http://www.w3.org/2000/svg" width="90" height="80">   <g class="icon">     <rect class="frstbar" x="10" y="10" width="70" height="12" rx="7" ry="7" fill="#414141"/>     <rect class="scndbar" x="10" y="35" width="70" height="12" rx="7" ry="7" fill="#414141"/>     <rect class="thrdbar" x="10" y="60" width="70" height="12" rx="7" ry="7" fill="#414141"/>   </g> </svg>

css

.hamburger { display:block; text-align:center; } svg { cursor:pointer; }  .frstbar, .scndbar, .thrdbar {   -webkit-transition: 0.35s linear;   -moz-transition: 0.35s linear;     -o-transition: 0.35s linear;     transition: 0.35s linear; } #burgericon.open .frstbar {   -webkit-transform: rotate(45deg);   -ms-transform: rotate(45deg);   transform: rotate(45deg); } #burgericon.open .thrdbar {   -webkit-transform: rotate(-45deg);   -ms-transform: rotate(-45deg);   transform: rotate(-45deg); } #burgericon.open .scndbar { width: 0; opacity: 0; }

js

$('#burgericon').on('click', function(e) {    if($(this).attr('class') != "open") {       $(this).attr('class','open');       $('.frstbar').attr('x','25').attr('y','-5');       $('.thrdbar').attr('x','-35').attr('y','55');     }    else {     $(this).attr('class','default');     $('.frstbar').attr('x','10').attr('y','10');       $('.thrdbar').attr('x','10').attr('y','60');     } });

i think changing x/y coords causing blurry effect. i've added screenshot below. first you'll see completed x icon , you'll see how looks when animated default.

the bars aren't straight instead crooked reason.

screenshot here

i'm still new svg manipulation i'm not sure how rotate <rect> elements css3/js. or tips in right direction more appreciated.

you can remove js positioning using css transform-origin property. can set on left of first , second bars transform-origin: 0 50%;.

this way cross each other when rotated :

document.getelementbyid('burgericon').addeventlistener('click', function (e) {      this.classlist.toggle('open');  });
.hamburger {    display: block;    text-align: center;  }  svg {    cursor: pointer;  }  .frstbar,.scndbar,.thrdbar {    transition: 0.35s linear;    transform: rotate(0deg);    transform-origin: 0% 50%;  }  #burgericon.open .frstbar {    transform: rotate(45deg);  }  #burgericon.open .thrdbar {    transform: rotate(-45deg);  }  #burgericon.open .scndbar {    width: 0;    opacity: 0;  }
<nav class="hamburger">    <svg id="burgericon" xmlns="http://www.w3.org/2000/svg" width="90" height="80">      <g class="icon">        <rect class="frstbar" x="10" y="10" width="70" height="12" rx="7" ry="7" fill="#414141" />        <rect class="scndbar" x="10" y="35" width="70" height="12" rx="7" ry="7" fill="#414141" />        <rect class="thrdbar" x="10" y="60" width="70" height="12" rx="7" ry="7" fill="#414141" />      </g>    </svg>  </nav>  <div>  </div>

credits david thomas js

note transform-origin property needs same vendor prefixes transform property. have omited them both in above snippet


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