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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const { SyncWaterfallHook } = require("tapable");
const Compilation = require("../Compilation");
const RuntimeGlobals = require("../RuntimeGlobals");
const RuntimeModule = require("../RuntimeModule");
const Template = require("../Template");
const compileBooleanMatcher = require("../util/compileBooleanMatcher");
const { chunkHasCss } = require("./CssModulesPlugin");
/** @typedef {import("../../declarations/WebpackOptions").Environment} Environment */
/** @typedef {import("../Chunk")} Chunk */
/** @typedef {import("../ChunkGraph")} ChunkGraph */
/** @typedef {import("../Compilation").RuntimeRequirementsContext} RuntimeRequirementsContext */
/** @typedef {import("../Module").ReadOnlyRuntimeRequirements} ReadOnlyRuntimeRequirements */
/**
* @typedef {object} CssLoadingRuntimeModulePluginHooks
* @property {SyncWaterfallHook<[string, Chunk]>} createStylesheet
* @property {SyncWaterfallHook<[string, Chunk]>} linkPreload
* @property {SyncWaterfallHook<[string, Chunk]>} linkPrefetch
*/
/** @type {WeakMap<Compilation, CssLoadingRuntimeModulePluginHooks>} */
const compilationHooksMap = new WeakMap();
class CssLoadingRuntimeModule extends RuntimeModule {
/**
* @param {Compilation} compilation the compilation
* @returns {CssLoadingRuntimeModulePluginHooks} hooks
*/
static getCompilationHooks(compilation) {
if (!(compilation instanceof Compilation)) {
throw new TypeError(
"The 'compilation' argument must be an instance of Compilation"
);
}
let hooks = compilationHooksMap.get(compilation);
if (hooks === undefined) {
hooks = {
createStylesheet: new SyncWaterfallHook(["source", "chunk"]),
linkPreload: new SyncWaterfallHook(["source", "chunk"]),
linkPrefetch: new SyncWaterfallHook(["source", "chunk"])
};
compilationHooksMap.set(compilation, hooks);
}
return hooks;
}
/**
* @param {ReadOnlyRuntimeRequirements} runtimeRequirements runtime requirements
*/
constructor(runtimeRequirements) {
super("css loading", 10);
this._runtimeRequirements = runtimeRequirements;
}
/**
* @returns {string | null} runtime code
*/
generate() {
const { _runtimeRequirements } = this;
const compilation = /** @type {Compilation} */ (this.compilation);
const chunk = /** @type {Chunk} */ (this.chunk);
const {
chunkGraph,
runtimeTemplate,
outputOptions: {
crossOriginLoading,
uniqueName,
chunkLoadTimeout: loadTimeout,
charset
}
} = compilation;
const fn = RuntimeGlobals.ensureChunkHandlers;
const conditionMap = chunkGraph.getChunkConditionMap(
/** @type {Chunk} */ (chunk),
/**
* @param {Chunk} chunk the chunk
* @param {ChunkGraph} chunkGraph the chunk graph
* @returns {boolean} true, if the chunk has css
*/
(chunk, chunkGraph) =>
Boolean(chunkGraph.getChunkModulesIterableBySourceType(chunk, "css"))
);
const hasCssMatcher = compileBooleanMatcher(conditionMap);
const withLoading =
_runtimeRequirements.has(RuntimeGlobals.ensureChunkHandlers) &&
hasCssMatcher !== false;
/** @type {boolean} */
const withHmr = _runtimeRequirements.has(
RuntimeGlobals.hmrDownloadUpdateHandlers
);
/** @type {Set<number | string | null>} */
const initialChunkIds = new Set();
for (const c of /** @type {Chunk} */ (chunk).getAllInitialChunks()) {
if (chunkHasCss(c, chunkGraph)) {
initialChunkIds.add(c.id);
}
}
if (!withLoading && !withHmr) {
return null;
}
const environment =
/** @type {Environment} */
(compilation.outputOptions.environment);
const isNeutralPlatform = runtimeTemplate.isNeutralPlatform();
const withPrefetch =
this._runtimeRequirements.has(RuntimeGlobals.prefetchChunkHandlers) &&
(environment.document || isNeutralPlatform) &&
chunk.hasChildByOrder(chunkGraph, "prefetch", true, chunkHasCss);
const withPreload =
this._runtimeRequirements.has(RuntimeGlobals.preloadChunkHandlers) &&
(environment.document || isNeutralPlatform) &&
chunk.hasChildByOrder(chunkGraph, "preload", true, chunkHasCss);
const { linkPreload, linkPrefetch } =
CssLoadingRuntimeModule.getCompilationHooks(compilation);
const withFetchPriority = _runtimeRequirements.has(
RuntimeGlobals.hasFetchPriority
);
const { createStylesheet } =
CssLoadingRuntimeModule.getCompilationHooks(compilation);
const stateExpression = withHmr
? `${RuntimeGlobals.hmrRuntimeStatePrefix}_css`
: undefined;
const code = Template.asString([
"link = document.createElement('link');",
charset ? "link.charset = 'utf-8';" : "",
`if (${RuntimeGlobals.scriptNonce}) {`,
Template.indent(
`link.setAttribute("nonce", ${RuntimeGlobals.scriptNonce});`
),
"}",
uniqueName
? 'link.setAttribute("data-webpack", uniqueName + ":" + key);'
: "",
withFetchPriority
? Template.asString([
"if(fetchPriority) {",
Template.indent(
'link.setAttribute("fetchpriority", fetchPriority);'
),
"}"
])
: "",
"link.setAttribute(loadingAttribute, 1);",
'link.rel = "stylesheet";',
"link.href = url;",
crossOriginLoading
? crossOriginLoading === "use-credentials"
? 'link.crossOrigin = "use-credentials";'
: Template.asString([
"if (link.href.indexOf(window.location.origin + '/') !== 0) {",
Template.indent(
`link.crossOrigin = ${JSON.stringify(crossOriginLoading)};`
),
"}"
])
: ""
]);
return Template.asString([
"// object to store loaded and loading chunks",
"// undefined = chunk not loaded, null = chunk preloaded/prefetched",
"// [resolve, reject, Promise] = chunk loading, 0 = chunk loaded",
`var installedChunks = ${
stateExpression ? `${stateExpression} = ${stateExpression} || ` : ""
}{`,
Template.indent(
Array.from(initialChunkIds, id => `${JSON.stringify(id)}: 0`).join(
",\n"
)
),
"};",
"",
uniqueName
? `var uniqueName = ${JSON.stringify(
runtimeTemplate.outputOptions.uniqueName
)};`
: "// data-webpack is not used as build has no uniqueName",
withLoading || withHmr
? Template.asString([
'var loadingAttribute = "data-webpack-loading";',
`var loadStylesheet = ${runtimeTemplate.basicFunction(
`chunkId, url, done${
withFetchPriority ? ", fetchPriority" : ""
}${withHmr ? ", hmr" : ""}`,
[
'var link, needAttach, key = "chunk-" + chunkId;',
withHmr ? "if(!hmr) {" : "",
'var links = document.getElementsByTagName("link");',
"for(var i = 0; i < links.length; i++) {",
Template.indent([
"var l = links[i];",
`if(l.rel == "stylesheet" && (${
withHmr
? 'l.href.startsWith(url) || l.getAttribute("href").startsWith(url)'
: 'l.href == url || l.getAttribute("href") == url'
}${
uniqueName
? ' || l.getAttribute("data-webpack") == uniqueName + ":" + key'
: ""
})) { link = l; break; }`
]),
"}",
"if(!done) return link;",
withHmr ? "}" : "",
"if(!link) {",
Template.indent([
"needAttach = true;",
createStylesheet.call(code, /** @type {Chunk} */ (this.chunk))
]),
"}",
`var onLinkComplete = ${runtimeTemplate.basicFunction(
"prev, event",
Template.asString([
"link.onerror = link.onload = null;",
"link.removeAttribute(loadingAttribute);",
"clearTimeout(timeout);",
'if(event && event.type != "load") link.parentNode.removeChild(link)',
"done(event);",
"if(prev) return prev(event);"
])
)};`,
"if(link.getAttribute(loadingAttribute)) {",
Template.indent([
`var timeout = setTimeout(onLinkComplete.bind(null, undefined, { type: 'timeout', target: link }), ${loadTimeout});`,
"link.onerror = onLinkComplete.bind(null, link.onerror);",
"link.onload = onLinkComplete.bind(null, link.onload);"
]),
"} else onLinkComplete(undefined, { type: 'load', target: link });", // We assume any existing stylesheet is render blocking
withHmr && withFetchPriority
? 'if (hmr && hmr.getAttribute("fetchpriority")) link.setAttribute("fetchpriority", hmr.getAttribute("fetchpriority"));'
: "",
withHmr ? "hmr ? document.head.insertBefore(link, hmr) :" : "",
"needAttach && document.head.appendChild(link);",
"return link;"
]
)};`
])
: "",
withLoading
? Template.asString([
`${fn}.css = ${runtimeTemplate.basicFunction(
`chunkId, promises${withFetchPriority ? " , fetchPriority" : ""}`,
[
"// css chunk loading",
`var installedChunkData = ${RuntimeGlobals.hasOwnProperty}(installedChunks, chunkId) ? installedChunks[chunkId] : undefined;`,
'if(installedChunkData !== 0) { // 0 means "already installed".',
Template.indent([
"",
'// a Promise means "currently loading".',
"if(installedChunkData) {",
Template.indent(["promises.push(installedChunkData[2]);"]),
"} else {",
Template.indent([
hasCssMatcher === true
? "if(true) { // all chunks have CSS"
: `if(${hasCssMatcher("chunkId")}) {`,
Template.indent([
"// setup Promise in chunk cache",
`var promise = new Promise(${runtimeTemplate.expressionFunction(
"installedChunkData = installedChunks[chunkId] = [resolve, reject]",
"resolve, reject"
)});`,
"promises.push(installedChunkData[2] = promise);",
"",
"// start chunk loading",
`var url = ${RuntimeGlobals.publicPath} + ${RuntimeGlobals.getChunkCssFilename}(chunkId);`,
"// create error before stack unwound to get useful stacktrace later",
"var error = new Error();",
`var loadingEnded = ${runtimeTemplate.basicFunction(
"event",
[
`if(${RuntimeGlobals.hasOwnProperty}(installedChunks, chunkId)) {`,
Template.indent([
"installedChunkData = installedChunks[chunkId];",
"if(installedChunkData !== 0) installedChunks[chunkId] = undefined;",
"if(installedChunkData) {",
Template.indent([
'if(event.type !== "load") {',
Template.indent([
"var errorType = event && event.type;",
"var realHref = event && event.target && event.target.href;",
"error.message = 'Loading css chunk ' + chunkId + ' failed.\\n(' + errorType + ': ' + realHref + ')';",
"error.name = 'ChunkLoadError';",
"error.type = errorType;",
"error.request = realHref;",
"installedChunkData[1](error);"
]),
"} else {",
Template.indent([
"installedChunks[chunkId] = 0;",
"installedChunkData[0]();"
]),
"}"
]),
"}"
]),
"}"
]
)};`,
isNeutralPlatform
? "if (typeof document !== 'undefined') {"
: "",
Template.indent([
`loadStylesheet(chunkId, url, loadingEnded${
withFetchPriority ? ", fetchPriority" : ""
});`
]),
isNeutralPlatform
? "} else { loadingEnded({ type: 'load' }); }"
: ""
]),
"} else installedChunks[chunkId] = 0;"
]),
"}"
]),
"}"
]
)};`
])
: "// no chunk loading",
"",
withPrefetch && hasCssMatcher !== false
? `${
RuntimeGlobals.prefetchChunkHandlers
}.s = ${runtimeTemplate.basicFunction("chunkId", [
`if((!${
RuntimeGlobals.hasOwnProperty
}(installedChunks, chunkId) || installedChunks[chunkId] === undefined) && ${
hasCssMatcher === true ? "true" : hasCssMatcher("chunkId")
}) {`,
Template.indent([
"installedChunks[chunkId] = null;",
isNeutralPlatform
? "if (typeof document === 'undefined') return;"
: "",
linkPrefetch.call(
Template.asString([
"var link = document.createElement('link');",
charset ? "link.charset = 'utf-8';" : "",
crossOriginLoading
? `link.crossOrigin = ${JSON.stringify(
crossOriginLoading
)};`
: "",
`if (${RuntimeGlobals.scriptNonce}) {`,
Template.indent(
`link.setAttribute("nonce", ${RuntimeGlobals.scriptNonce});`
),
"}",
'link.rel = "prefetch";',
'link.as = "style";',
`link.href = ${RuntimeGlobals.publicPath} + ${RuntimeGlobals.getChunkCssFilename}(chunkId);`
]),
chunk
),
"document.head.appendChild(link);"
]),
"}"
])};`
: "// no prefetching",
"",
withPreload && hasCssMatcher !== false
? `${
RuntimeGlobals.preloadChunkHandlers
}.s = ${runtimeTemplate.basicFunction("chunkId", [
`if((!${
RuntimeGlobals.hasOwnProperty
}(installedChunks, chunkId) || installedChunks[chunkId] === undefined) && ${
hasCssMatcher === true ? "true" : hasCssMatcher("chunkId")
}) {`,
Template.indent([
"installedChunks[chunkId] = null;",
isNeutralPlatform
? "if (typeof document === 'undefined') return;"
: "",
linkPreload.call(
Template.asString([
"var link = document.createElement('link');",
charset ? "link.charset = 'utf-8';" : "",
`if (${RuntimeGlobals.scriptNonce}) {`,
Template.indent(
`link.setAttribute("nonce", ${RuntimeGlobals.scriptNonce});`
),
"}",
'link.rel = "preload";',
'link.as = "style";',
`link.href = ${RuntimeGlobals.publicPath} + ${RuntimeGlobals.getChunkCssFilename}(chunkId);`,
crossOriginLoading
? crossOriginLoading === "use-credentials"
? 'link.crossOrigin = "use-credentials";'
: Template.asString([
"if (link.href.indexOf(window.location.origin + '/') !== 0) {",
Template.indent(
`link.crossOrigin = ${JSON.stringify(
crossOriginLoading
)};`
),
"}"
])
: ""
]),
chunk
),
"document.head.appendChild(link);"
]),
"}"
])};`
: "// no preloaded",
withHmr
? Template.asString([
"var oldTags = [];",
"var newTags = [];",
`var applyHandler = ${runtimeTemplate.basicFunction("options", [
`return { dispose: ${runtimeTemplate.basicFunction("", [
"while(oldTags.length) {",
Template.indent([
"var oldTag = oldTags.pop();",
"if(oldTag.parentNode) oldTag.parentNode.removeChild(oldTag);"
]),
"}"
])}, apply: ${runtimeTemplate.basicFunction("", [
"while(newTags.length) {",
Template.indent([
"var newTag = newTags.pop();",
"newTag.sheet.disabled = false"
]),
"}"
])} };`
])}`,
`var cssTextKey = ${runtimeTemplate.returningFunction(
`Array.from(link.sheet.cssRules, ${runtimeTemplate.returningFunction(
"r.cssText",
"r"
)}).join()`,
"link"
)};`,
`${
RuntimeGlobals.hmrDownloadUpdateHandlers
}.css = ${runtimeTemplate.basicFunction(
"chunkIds, removedChunks, removedModules, promises, applyHandlers, updatedModulesList",
[
isNeutralPlatform
? "if (typeof document === 'undefined') return;"
: "",
"applyHandlers.push(applyHandler);",
`chunkIds.forEach(${runtimeTemplate.basicFunction("chunkId", [
`var filename = ${RuntimeGlobals.getChunkCssFilename}(chunkId);`,
`var url = ${RuntimeGlobals.publicPath} + filename;`,
"var oldTag = loadStylesheet(chunkId, url);",
"if(!oldTag) return;",
`promises.push(new Promise(${runtimeTemplate.basicFunction(
"resolve, reject",
[
`var link = loadStylesheet(chunkId, url + (url.indexOf("?") < 0 ? "?" : "&") + "hmr=" + Date.now(), ${runtimeTemplate.basicFunction(
"event",
[
'if(event.type !== "load") {',
Template.indent([
"var errorType = event && event.type;",
"var realHref = event && event.target && event.target.href;",
"error.message = 'Loading css hot update chunk ' + chunkId + ' failed.\\n(' + errorType + ': ' + realHref + ')';",
"error.name = 'ChunkLoadError';",
"error.type = errorType;",
"error.request = realHref;",
"reject(error);"
]),
"} else {",
Template.indent([
"try { if(cssTextKey(oldTag) == cssTextKey(link)) { if(link.parentNode) link.parentNode.removeChild(link); return resolve(); } } catch(e) {}",
"link.sheet.disabled = true;",
"oldTags.push(oldTag);",
"newTags.push(link);",
"resolve();"
]),
"}"
]
)}, ${withFetchPriority ? "undefined," : ""} oldTag);`
]
)}));`
])});`
]
)}`
])
: "// no hmr"
]);
}
}
module.exports = CssLoadingRuntimeModule;