1 files changed, 23 insertions, 0 deletions
diff --git a/client/vendor/util.js b/client/vendor/util.js
new file mode 100644
index 0000000..5d51c34
--- /dev/null
+++ b/client/vendor/util.js
@@ -0,0 +1,23 @@
+const isIphone = (navigator.userAgent.match(/iPhone/i)) || (navigator.userAgent.match(/iPod/i))
+const isIpad = (navigator.userAgent.match(/iPad/i))
+const isAndroid = (navigator.userAgent.match(/Android/i))
+const isMobile = isIphone || isIpad || isAndroid
+const isDesktop = ! isMobile
+
+document.body.classList.add(isMobile ? 'mobile' : 'desktop')
+
+const browser = { isIphone, isIpad, isAndroid, isMobile, isDesktop }
+
+function clamp(n,a,b){ return n<a?a:n<b?n:b }
+function mod(n,m){ return n-(m * Math.floor(n/m)) }
+function choice (a){ return a[ randint(a.length) ] }
+function randint(n){ return  Math.floor(Math.random() * n) }
+function randrange(a,b) { return Math.random() * (b-a) + a }
+function firstTouch(f){ return e => { e.preventDefault(); f(e.touches[0]) }}
+
+export {
+  browser,
+  clamp, mod,
+  choice, randint, randrange,
+  firstTouch,
+}