Remove IE11 support (#11470)

* Remove IE11 support

With master now on 1.13, it's time to drop IE11 for good. The woff
variants are also in use by Opera Mini but it has even less market share
and I can only imagine how broken the UI is in it.

Fixes: https://github.com/go-gitea/gitea/issues/6147

* update docs

Co-authored-by: techknowlogick <techknowlogick@gitea.io>

docs/content/doc/features/authentication.en-us.md

@@ -238,9 +238,9 @@ Before activating SSPI single sign-on authentication (SSO) you have to prepare y
 
 - Sign in to a client computer in the same domain with any domain user (client computer, different from the server running `gitea.exe`)
 
-- If you are using Chrome, Edge or Internet Explorer, add the URL of the web app to the Local intranet sites (`Internet Options -> Security -> Local intranet -> Sites`)
+- If you are using Chrome or Edge, add the URL of the web app to the Local intranet sites (`Internet Options -> Security -> Local intranet -> Sites`)
 
-- Start Chrome, Edge or Internet Explorer and navigate to the FQDN URL of gitea (eg. `http://host.domain.local:3000`)
+- Start Chrome or Edge and navigate to the FQDN URL of gitea (eg. `http://host.domain.local:3000`)
 
 - Click the `Sign In` button on the dashboard and choose SSPI to be automatically logged in with the same user that is currently logged on to the computer
 

docs/content/page/index.en-us.md

@@ -261,7 +261,9 @@ Windows, on architectures like amd64, i386, ARM, PowerPC, and others.
 
 ## Browser Support
 
-- Please see [Semantic UI](https://github.com/Semantic-Org/Semantic-UI#browser-support) for specific versions of supported browsers.
+- Last 2 versions of Chrome, Firefox and Safari
+- Firefox ESR
+- Edge 14+
 
 ## Components
 

package.json

@@ -58,6 +58,8 @@
     "updates": "10.2.11"
   },
   "browserslist": [
-    "defaults"
+    "defaults",
+    "not ie > 0",
+    "not ie_mob > 0"
   ]
 }

web_src/js/index.js

@@ -3,7 +3,6 @@
 /* exported toggleDeadlineForm, setDeadline, updateDeadline, deleteDependencyModal, cancelCodeComment, onOAuthLoginClick */
 
 import './publicpath.js';
-import './polyfills.js';
 
 import Vue from 'vue';
 import 'jquery.are-you-sure';

web_src/js/polyfills.js

@@ -1,17 +0,0 @@
-// compat: IE11
-if (!Element.prototype.matches) {
-  Element.prototype.matches = Element.prototype.msMatchesSelector || Element.prototype.webkitMatchesSelector;
-}
-
-// compat: IE11
-if (!Element.prototype.closest) {
-  Element.prototype.closest = function (s) {
-    let el = this;
-
-    do {
-      if (el.matches(s)) return el;
-      el = el.parentElement || el.parentNode;
-    } while (el !== null && el.nodeType === 1);
-    return null;
-  };
-}

web_src/js/publicpath.js

@@ -1,11 +1,5 @@
 // This sets up webpack's chunk loading to load resources from the 'public'
 // directory. This file must be imported before any lazy-loading is being attempted.
 
-if (document.currentScript && document.currentScript.src) {
 const url = new URL(document.currentScript.src);
 __webpack_public_path__ = url.pathname.replace(/\/[^/]*?\/[^/]*?$/, '/');
-} else {
-  // compat: IE11
-  const script = document.querySelector('script[src*="/index.js"]');
-  __webpack_public_path__ = script.getAttribute('src').replace(/\/[^/]*?\/[^/]*?$/, '/');
-}

web_src/less/_base.less

@@ -7,9 +7,7 @@
         local('Roboto'),
         local('Roboto-Regular'),
         /* Chrome 26+, Opera 23+, Firefox 39+ */
-        url('../vendor/assets/roboto-fonts/roboto-v20-latin-ext_cyrillic-ext_latin_greek_vietnamese_cyrillic_greek-ext-regular.woff2') format('woff2'),
-        /* Chrome 6+, Firefox 3.6+, IE 9+, Safari 5.1+ */
-        url('../vendor/assets/roboto-fonts/roboto-v20-latin-ext_cyrillic-ext_latin_greek_vietnamese_cyrillic_greek-ext-regular.woff') format('woff');
+        url('../vendor/assets/roboto-fonts/roboto-v20-latin-ext_cyrillic-ext_latin_greek_vietnamese_cyrillic_greek-ext-regular.woff2') format('woff2');
 }
 
 /* roboto-italic - latin-ext_cyrillic-ext_latin_greek_vietnamese_cyrillic_greek-ext */
@@ -20,10 +18,7 @@
     src:
         local('Roboto Italic'),
         local('Roboto-Italic'),
-        /* Chrome 26+, Opera 23+, Firefox 39+ */
-        url('../vendor/assets/roboto-fonts/roboto-v20-latin-ext_cyrillic-ext_latin_greek_vietnamese_cyrillic_greek-ext-italic.woff2') format('woff2'),
-        /* Chrome 6+, Firefox 3.6+, IE 9+, Safari 5.1+ */
-        url('../vendor/assets/roboto-fonts/roboto-v20-latin-ext_cyrillic-ext_latin_greek_vietnamese_cyrillic_greek-ext-italic.woff') format('woff');
+        url('../vendor/assets/roboto-fonts/roboto-v20-latin-ext_cyrillic-ext_latin_greek_vietnamese_cyrillic_greek-ext-italic.woff2') format('woff2');
 }
 
 /* roboto-700 - latin-ext_cyrillic-ext_latin_greek_vietnamese_cyrillic_greek-ext */
@@ -34,10 +29,7 @@
     src:
         local('Roboto Bold'),
         local('Roboto-Bold'),
-        /* Chrome 26+, Opera 23+, Firefox 39+ */
-        url('../vendor/assets/roboto-fonts/roboto-v20-latin-ext_cyrillic-ext_latin_greek_vietnamese_cyrillic_greek-ext-700.woff2') format('woff2'),
-        /* Chrome 6+, Firefox 3.6+, IE 9+, Safari 5.1+ */
-        url('../vendor/assets/roboto-fonts/roboto-v20-latin-ext_cyrillic-ext_latin_greek_vietnamese_cyrillic_greek-ext-700.woff') format('woff');
+        url('../vendor/assets/roboto-fonts/roboto-v20-latin-ext_cyrillic-ext_latin_greek_vietnamese_cyrillic_greek-ext-700.woff2') format('woff2');
 }
 
 /* roboto-700italic - latin-ext_cyrillic-ext_latin_greek_vietnamese_cyrillic_greek-ext */
@@ -48,10 +40,7 @@
     src:
         local('Roboto Bold Italic'),
         local('Roboto-BoldItalic'),
-        /* Chrome 26+, Opera 23+, Firefox 39+ */
-        url('../vendor/assets/roboto-fonts/roboto-v20-latin-ext_cyrillic-ext_latin_greek_vietnamese_cyrillic_greek-ext-700italic.woff2') format('woff2'),
-        /* Chrome 6+, Firefox 3.6+, IE 9+, Safari 5.1+ */
-        url('../vendor/assets/roboto-fonts/roboto-v20-latin-ext_cyrillic-ext_latin_greek_vietnamese_cyrillic_greek-ext-700italic.woff') format('woff');
+        url('../vendor/assets/roboto-fonts/roboto-v20-latin-ext_cyrillic-ext_latin_greek_vietnamese_cyrillic_greek-ext-700italic.woff2') format('woff2');
 }
 
 @font-face {