fix(index): update to allow requesting failed async css files

Author: cwalten

Diff for: src/index.js

@@ -334,22 +334,6 @@ class MiniCssExtractPlugin {
                 Template.indent([
                   `var href = ${linkHrefPath};`,
                   `var fullhref = ${mainTemplate.requireFn}.p + href;`,
-                  'var existingLinkTags = document.getElementsByTagName("link");',
-                  'for(var i = 0; i < existingLinkTags.length; i++) {',
-                  Template.indent([
-                    'var tag = existingLinkTags[i];',
-                    'var dataHref = tag.getAttribute("data-href") || tag.getAttribute("href");',
-                    'if(tag.rel === "stylesheet" && (dataHref === href || dataHref === fullhref)) return resolve();',
-                  ]),
-                  '}',
-                  'var existingStyleTags = document.getElementsByTagName("style");',
-                  'for(var i = 0; i < existingStyleTags.length; i++) {',
-                  Template.indent([
-                    'var tag = existingStyleTags[i];',
-                    'var dataHref = tag.getAttribute("data-href");',
-                    'if(dataHref === href || dataHref === fullhref) return resolve();',
-                  ]),
-                  '}',
                   'var linkTag = document.createElement("link");',
                   'linkTag.rel = "stylesheet";',
                   'linkTag.type = "text/css";',
@@ -359,6 +343,7 @@ class MiniCssExtractPlugin {
                     'var request = event && event.target && event.target.src || fullhref;',
                     'var err = new Error("Loading CSS chunk " + chunkId + " failed.\\n(" + request + ")");',
                     'err.request = request;',
+                    'delete installedCssChunks[chunkId]',
                     'reject(err);',
                   ]),
                   '};',