fix: fallback for browsers which doesn't support for calc()

See #13

release 2.6.4

layouts/partials/head.html

@@ -57,7 +57,7 @@
 {{- end }}
 
 <!-- Styles -->
-<link href="{{ "dist/even.min.css?v=2.6.3" | relURL }}" rel="stylesheet">
+<link href="{{ "dist/even.min.css?v=2.6.4" | relURL }}" rel="stylesheet">
 {{ if .Site.Params.bootcdn -}}
   {{ if .Site.Params.fancybox }}<link href="https://cdn.bootcss.com/fancybox/3.1.20/jquery.fancybox.min.css" rel="stylesheet" crossorigin="anonymous">{{ end }}
 {{- else if .Site.Params.publicCDN.enable -}}

layouts/partials/scripts.html

@@ -13,7 +13,7 @@
   <script type="text/javascript" src="{{ "lib/slideout/slideout-1.0.1.min.js" | relURL }}"></script>
   {{ if .Site.Params.fancybox }}<script type="text/javascript" src="{{ "lib/fancybox/jquery.fancybox-3.1.20.min.js" | relURL }}"></script>{{ end }}
 {{- end }}
-<script type="text/javascript" src="{{ "dist/even.min.js?v=2.6.3" | relURL }}"></script>
+<script type="text/javascript" src="{{ "dist/even.min.js?v=2.6.4" | relURL }}"></script>
 
 {{- if and (and .Site.Params.mathjax (ne .Params.mathjax false)) (or .IsPage .IsHome) }}
   <script type="text/javascript">

src/css/_common/_animation.scss

@@ -96,6 +96,9 @@
 
   span {
     position: absolute;
+    /* fallback for browsers which still doesn't support for `calc()` */
+    left: 15px;
+    top: 25px;
     left: calc((100% - 20px) / 2);
     top: calc((100% - 1px) / 2);
     width: 20px;

src/package.json

@@ -1,6 +1,6 @@
 {
   "name": "even-src",
-  "version": "2.6.3",
+  "version": "2.6.4",
   "description": "even source file",
   "main": "index.js",
   "scripts": {