diff --git a/public/js/scripts-authed.min.js b/public/js/scripts-authed.min.js
index 18b80b3c..56f6e886 100644
--- a/public/js/scripts-authed.min.js
+++ b/public/js/scripts-authed.min.js
@@ -1,20 +1,21 @@
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diff --git a/public/js/scripts-authed.min.js.map b/public/js/scripts-authed.min.js.map
index e008f50d..baeb5419 100644
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+++ b/public/js/scripts-authed.min.js.map
@@ -1 +1 @@
-{"version":3,"file":"scripts-authed.min.js.map","sources":[],"sourcesContent":[],"names":[],"mappings":";;;;;;;;;;;;;;;;;;;"}
\ No newline at end of file
+{"version":3,"file":"scripts-authed.min.js.map","sources":[],"sourcesContent":[],"names":[],"mappings":";;;;;;;;;;;;;;;;;;;;"}
\ No newline at end of file
diff --git a/public/js/scripts.min.js b/public/js/scripts.min.js
index a2c074ff..84c7a076 100644
--- a/public/js/scripts.min.js
+++ b/public/js/scripts.min.js
@@ -4,9 +4,10 @@ d.arrayIterator=function(a){var e=0;return d.iteratorPrototype(function(){return
 d.iteratorFromArray=function(a,e){d.initSymbolIterator();a instanceof String&&(a+="");var g=0,f={next:function(){if(g<a.length){var c=g++;return{value:e(c,a[c]),done:!1}}f.next=function(){return{done:!0,value:void 0}};return f.next()}};f[Symbol.iterator]=function(){return f};return f};
 d.polyfill=function(a,e){if(e){var g=d.global;a=a.split(".");for(var f=0;f<a.length-1;f++){var c=a[f];c in g||(g[c]={});g=g[c]}a=a[a.length-1];f=g[a];e=e(f);e!=f&&null!=e&&d.defineProperty(g,a,{configurable:!0,writable:!0,value:e})}};d.polyfill("Array.prototype.keys",function(a){return a?a:function(){return d.iteratorFromArray(this,function(a){return a})}},"es6","es3");
 (function(){function a(c,b,h){b.match(/^([\w\-]+)$/)||b.split(" ").forEach(function(b){a(c,b,h)});c.addEventListener(b,h,!1)}function e(c,b,h,k){a(c,h,function(a){f.$(b,c).forEach(function(b){a.target==b&&(k.call(b,a),a.stopPropagation())})})}function g(c){var b=[];Object.keys(c).forEach(function(a){var h=c[a].toString();a=encodeURIComponent(a);h=encodeURIComponent(h);b.push(a+"\x3d"+h)});return b.join("\x26")}var f={noop:function(){},$:function(c,b){b=void 0===b?null:b;if("string"!==typeof c)return c;
-b=null!==b&&1===b.nodeType?b:document;var a=[];c.match(/^#([\w]+$)/)?a.push(document.getElementById(c.split("#")[1])):a=[].slice.apply(b.querySelectorAll(c));return a},hasElement:function(a){return 0<f.$(a).length},scrollToTop:function(){window.scroll(0,0)},hide:function(a){a.setAttribute("hidden","hidden")},show:function(a){a.removeAttribute("hidden")},showMessage:function(a,b){a="\x3cdiv class\x3d'message "+a+"'\x3e\n\t\t\t\t\x3cspan class\x3d'icon'\x3e\x3c/span\x3e\n\t\t\t\t"+b+"\n\t\t\t\t\x3cspan class\x3d'close'\x3e\x3c/span\x3e\n\t\t\t\x3c/div\x3e";
-b=f.$(".message");void 0!==b[0]&&b[0].remove();f.$("header")[0].insertAdjacentHTML("beforeend",a)},closestParent:function(a,b){if(void 0!==Element.prototype.closest)return a.closest(b);for(;a!==document.documentElement;){for(var c=a,f=(c.document||c.ownerDocument).querySelectorAll(b),e=f.length;0<=--e&&f.item(e)!==c;);if(-1<e)return a;a=a.parentElement}return null},url:function(a){var b="//"+document.location.host;return b+="/"===a.charAt(0)?a:"/"+a},throttle:function(a,b,h){var c=!1;return function(f){for(var e=
+b=null!==b&&1===b.nodeType?b:document;var a=[];c.match(/^#([\w]+$)/)?a.push(document.getElementById(c.split("#")[1])):a=[].slice.apply(b.querySelectorAll(c));return a},hasElement:function(c){return 0<f.$(c).length},scrollToTop:function(){window.scroll(0,0)},hide:function(c){c.setAttribute("hidden","hidden")},show:function(c){c.removeAttribute("hidden")},showMessage:function(c,b){c="\x3cdiv class\x3d'message "+c+"'\x3e\n\t\t\t\t\x3cspan class\x3d'icon'\x3e\x3c/span\x3e\n\t\t\t\t"+b+"\n\t\t\t\t\x3cspan class\x3d'close'\x3e\x3c/span\x3e\n\t\t\t\x3c/div\x3e";
+b=f.$(".message");void 0!==b[0]&&b[0].remove();f.$("header")[0].insertAdjacentHTML("beforeend",c)},closestParent:function(c,b){if(void 0!==Element.prototype.closest)return c.closest(b);for(;c!==document.documentElement;){for(var a=c,f=(a.document||a.ownerDocument).querySelectorAll(b),e=f.length;0<=--e&&f.item(e)!==a;);if(-1<e)return c;c=c.parentElement}return null},url:function(a){var b="//"+document.location.host;return b+="/"===a.charAt(0)?a:"/"+a},throttle:function(a,b,h){var c=!1;return function(f){for(var e=
 [],g=0;g<arguments.length;++g)e[g-0]=arguments[g];g=h||this;c||(b.apply(g,e),c=!0,setTimeout(function(){c=!1},a))}},on:function(c,b,h,g){3===arguments.length?(g=h,f.$(c).forEach(function(c){a(c,b,g)})):f.$(c).forEach(function(a){e(a,h,b,g)})},ajax:function(a,b){b=b||{};b.data=b.data||{};b.type=b.type||"GET";b.dataType=b.dataType||"";b.success=b.success||f.noop;b.mimeType=b.mimeType||"application/x-www-form-urlencoded";b.error=b.error||f.noop;var c=new XMLHttpRequest,e=String(b.type).toUpperCase();
 "GET"===e&&(a+=a.match(/\?/)?g(b.data):"?"+g(b.data));c.open(e,a);c.onreadystatechange=function(){if(4===c.readyState){var a="json"===c.responseType?JSON.parse(c.responseText):c.responseText;299<c.status?b.error.call(null,c.status,a,c.response):b.success.call(null,a,c.status)}};"json"===b.dataType?(b.data=JSON.stringify(b.data),b.mimeType="application/json"):b.data=g(b.data);c.setRequestHeader("Content-Type",b.mimeType);switch(e){case "GET":c.send(null);break;default:c.send(b.data)}},get:function(a,
-b,e){e=void 0===e?null:e;null===e&&(e=b,b={});return f.ajax(a,{data:b,success:e})}};f.on("header","click",".message",function(){f.hide(this)});f.on("form.js-delete","submit",function(a){!1===confirm("Are you ABSOLUTELY SURE you want to delete this item?")&&(a.preventDefault(),a.stopPropagation())});f.on(".js-clear-cache","click",function(){f.get("/cache_purge",function(){f.showMessage("success","Successfully purged api cache")})})})();
+b,e){e=void 0===e?null:e;null===e&&(e=b,b={});return f.ajax(a,{data:b,success:e})}};f.on("header","click",".message",function(){f.hide(this)});f.on("form.js-delete","submit",function(a){!1===confirm("Are you ABSOLUTELY SURE you want to delete this item?")&&(a.preventDefault(),a.stopPropagation())});f.on(".js-clear-cache","click",function(){f.get("/cache_purge",function(){f.showMessage("success","Successfully purged api cache")})});"serviceWorker"in navigator&&navigator.serviceWorker.register("/sw.js").then(function(a){console.log("Service worker registered",
+a.scope)}).catch(function(a){console.error("Failed to register service worker",a)})})();
 //# sourceMappingURL=scripts.min.js.map
diff --git a/public/js/scripts.min.js.map b/public/js/scripts.min.js.map
index cdbd77da..dbc4bb95 100644
--- a/public/js/scripts.min.js.map
+++ b/public/js/scripts.min.js.map
@@ -1 +1 @@
-{"version":3,"file":"scripts.min.js.map","sources":[],"sourcesContent":[],"names":[],"mappings":";;;;;;;;;;;"}
\ No newline at end of file
+{"version":3,"file":"scripts.min.js.map","sources":[],"sourcesContent":[],"names":[],"mappings":";;;;;;;;;;;;"}
\ No newline at end of file
diff --git a/public/js/src/index-authed.js b/public/js/src/index-authed.js
index 71f16d05..b114713d 100644
--- a/public/js/src/index-authed.js
+++ b/public/js/src/index-authed.js
@@ -1,4 +1,4 @@
-import './base/events';
+import './index';
 
 import './anime_collection';
 import './anime_edit';
diff --git a/public/js/src/index.js b/public/js/src/index.js
index 843c8e65..bd95ebf0 100644
--- a/public/js/src/index.js
+++ b/public/js/src/index.js
@@ -1 +1,10 @@
 import './base/events';
+
+if ('serviceWorker' in navigator) {
+	navigator.serviceWorker.register('/sw.js').then(reg => {
+		console.log('Service worker registered', reg.scope);
+	}).catch(error => {
+		console.error('Failed to register service worker', error);
+	});
+}
+
diff --git a/public/tools/build-js.js b/public/tools/build-js.js
index 791174b7..1b4c27c0 100644
--- a/public/tools/build-js.js
+++ b/public/tools/build-js.js
@@ -11,31 +11,33 @@ const plugins = [
 	})
 ];
 
+const defaultOutput = {
+	format: 'iife',
+	sourcemap: true,
+}
+
 
 export default [{
 	input: './js/src/index.js',
 	output: {
+		...defaultOutput,
 		file: './js/scripts.min.js',
-		format: 'iife',
-		sourcemap: true,
 		sourcemapFile: './js/scripts.min.js.map',
 	},
 	plugins,
 }, {
 	input: './js/src/index-authed.js',
 	output: {
+		...defaultOutput,
 		file: './js/scripts-authed.min.js',
-		format: 'iife',
-		sourcemap: true,
 		sourcemapFile: './js/scripts-authed.min.js.map',
 	},
 	plugins,
 }, {
 	input: './js/src/base/sort_tables.js',
 	output: {
+		...defaultOutput,
 		file: './js/tables.min.js',
-		format: 'iife',
-		sourcemap: true,
 		sourcemapFile: './js/tables.min.js.map',
 	},
 	plugins,
diff --git a/sw.js b/sw.js
new file mode 100644
index 00000000..75f86d7e
--- /dev/null
+++ b/sw.js
@@ -0,0 +1,36 @@
+self.addEventListener('install', event => {
+	console.log('Worker installed');
+
+	event.waitUntil(
+		caches.open('hummingbird-anime-client')
+			.then(cache => cache.addAll([
+				'public/images/icons/favicon.ico',
+				'public/css/app.min.css',
+				'public/js/index.min.js',
+				'public/js/index-authed.min.js',
+				'public/js/tables.min.js',
+			]))
+	);
+});
+
+self.addEventListener('fetch', event => {
+
+	event.respondWith(
+		caches.match(event.request).then(response => {
+			if (response !== undefined) {
+				// Return cached version
+				return response;
+			}
+
+			return fetch(event.request).then(response => {
+				const clone = response.clone();
+
+				caches.open('hummingbird-anime-client').then(cache => {
+					cache.put(event.request, clone);
+				});
+
+				return response;
+			});
+		})
+	);
+});
\ No newline at end of file