Skip to content

only load CSS once #19

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
Mar 7, 2018
Merged

only load CSS once #19

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
25 changes: 23 additions & 2 deletions src/index.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -131,6 +131,25 @@ class MiniCssExtractPlugin {
}
});
const { mainTemplate } = compilation;
mainTemplate.hooks.localVars.tap(
'mini-css-extract-plugin',
(source, chunk) => {
const chunkMap = this.getCssChunkObject(chunk);
if (Object.keys(chunkMap).length > 0) {
return Template.asString([
source,
'',
'// object to store loaded CSS chunks',
'var installedCssChunks = {',
Template.indent(
chunk.ids.map(id => `${JSON.stringify(id)}: 0`).join(',\n'),
),
'}',
]);
}
return source;
},
);
mainTemplate.hooks.requireEnsure.tap(
'mini-css-extract-plugin',
(source, chunk, hash) => {
Expand Down Expand Up @@ -164,9 +183,10 @@ class MiniCssExtractPlugin {
'',
'// mini-css-extract-plugin CSS loading',
`var cssChunks = ${JSON.stringify(chunkMap)};`,
'if(cssChunks[chunkId]) {',
'if(installedCssChunks[chunkId]) promises.push(installedCssChunks[chunkId]);',
'else if(installedCssChunks[chunkId] !== 0 && cssChunks[chunkId]) {',
Template.indent([
'promises.push(new Promise(function(resolve, reject) {',
'promises.push(installedCssChunks[chunkId] = new Promise(function(resolve, reject) {',
Template.indent([
'var linkTag = document.createElement("link");',
'linkTag.rel = "stylesheet";',
Expand All @@ -175,6 +195,7 @@ class MiniCssExtractPlugin {
`linkTag.href = ${mainTemplate.requireFn}.p + ${linkHrefPath};`,
'var head = document.getElementsByTagName("head")[0];',
'head.appendChild(linkTag);',
'installedCssChunks[chunkId] = 0;',
]),
'}));',
]),
Expand Down