mirror of
https://github.com/facebook/react.git
synced 2025-11-01 09:12:30 +00:00
Don't minify symbols in production builds (#28881)
This disables symbol renaming in production builds. The original
variable and function names are preserved. All other forms of
compression applied by Closure (dead code elimination, inlining, etc)
are unchanged — the final program is identical to what we were producing
before, just in a more readable form.
The motivation is to make it easier to debug React issues that only
occur in production — the same reason we decided to start shipping
sourcemaps in #28827 and #28827.
However, because most apps run their own minification step on their npm
dependencies, it's not necessary for us to minify the symbols before
publishing — it'll be handled the app, if desired.
This is the same strategy Meta has used to ship React for years. The
React build itself has unminified symbols, but they get minified as part
of Meta's regular build pipeline.
Even if an app does not minify their npm dependencies, gzip covers most
of the cost of symbol renaming anyway.
This saves us from having to ship sourcemaps, which means even apps that
don't have sourcemaps configured will be able to debug the React build
as easily as they would any other npm dependency.
DiffTrain build for [857ee8cdf9](https://github.com/facebook/react/commit/857ee8cdf9af81bc94a7f04528fbda7fb2510eb4)
This commit is contained in:
acdlite
@@ -1 +1 @@
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ea26e38e33bffeba1ecc42688d7e8cd7e0da1c02
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857ee8cdf9af81bc94a7f04528fbda7fb2510eb4
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@@ -1 +1,235 @@
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(function(){function e(e,t,n){t=document.getElementById(t);t.parentNode.removeChild(t);var r=document.getElementById(e);if(r){e=r.previousSibling;if(n)e.data="$!",r.setAttribute("data-dgst",n);else{n=e.parentNode;r=e.nextSibling;var i=0;do{if(r&&8===r.nodeType){var d=r.data;if("/$"===d)if(0===i)break;else i--;else"$"!==d&&"$?"!==d&&"$!"!==d||i++}d=r.nextSibling;n.removeChild(r);r=d}while(r);for(;t.firstChild;)n.insertBefore(t.firstChild,r);e.data="$"}e._reactRetry&&e._reactRetry()}}function t(t,n,r){for(var i=new Map,o=document,a,l,c=o.querySelectorAll("link[data-precedence],style[data-precedence]"),s=[],u=0;l=c[u++];)"not all"===l.getAttribute("media")?s.push(l):("LINK"===l.tagName&&d.set(l.getAttribute("href"),l),i.set(l.dataset.precedence,a=l));l=0;c=[];var m,f;for(u=!0;;){if(u){var v=r[l++];if(!v){u=!1;l=0;continue}var p=!1,b=0;var g=v[b++];if(f=d.get(g)){var h=f._p;p=!0}else{f=o.createElement("link");f.href=g;f.rel="stylesheet";for(f.dataset.precedence=m=v[b++];h=v[b++];)f.setAttribute(h,v[b++]);h=f._p=new Promise((function(e,t){f.onload=e;f.onerror=t}));d.set(g,f)}g=f.getAttribute("media");!h||"l"===h.s||g&&!window.matchMedia(g).matches||c.push(h);if(p)continue}else{f=s[l++];if(!f)break;m=f.getAttribute("data-precedence");f.removeAttribute("media")}p=i.get(m)||a;p===a&&(a=f);i.set(m,f);p?p.parentNode.insertBefore(f,p.nextSibling):(p=o.head,p.insertBefore(f,p.firstChild))}Promise.all(c).then(e.bind(null,t,n,""),e.bind(null,t,n,"Resource failed to load"))}function n(e){e=e.querySelectorAll("template");for(var t=0;t<e.length;t++)i(e[t])}function r(e){function t(e){for(var t=0;t<e.length;t++)for(var n=e[t].addedNodes,r=0;r<n.length;r++)n[r].parentNode&&i(n[r])}var n=new MutationObserver(t);n.observe(e,{childList:!0});window.addEventListener("DOMContentLoaded",(function(){t(n.takeRecords());n.disconnect()}))}function i(n){if(1===n.nodeType&&n.dataset){var r=n.dataset;if(null!=r.rxi){var i=r.dgst,d=r.msg,o=r.stck,a=r.cstck,l=document.getElementById(r.bid);l&&(r=l.previousSibling,r.data="$!",l=l.dataset,i&&(l.dgst=i),d&&(l.msg=d),o&&(l.stck=o),a&&(l.cstck=a),r._reactRetry&&r._reactRetry());n.remove()}else if(null!=r.rri)t(r.bid,r.sid,JSON.parse(r.sty)),n.remove();else if(null!=r.rci)e(r.bid,r.sid),n.remove();else if(null!=r.rsi){i=r.pid;d=document.getElementById(r.sid);i=document.getElementById(i);for(d.parentNode.removeChild(d);d.firstChild;)i.parentNode.insertBefore(d.firstChild,i);i.parentNode.removeChild(i);n.remove()}}}var d=new Map;(function(){addEventListener("submit",(function(e){if(!e.defaultPrevented){var t=e.target,n=e.submitter,r=t.action,i=n;if(n){var d=n.getAttribute("formAction");null!=d&&(r=d,i=null)}"javascript:throw new Error('React form unexpectedly submitted.')"===r&&(e.preventDefault(),i?(e=document.createElement("input"),e.name=i.name,e.value=i.value,i.parentNode.insertBefore(e,i),i=new FormData(t),e.parentNode.removeChild(e)):i=new FormData(t),e=t.ownerDocument||t,(e.$$reactFormReplay=e.$$reactFormReplay||[]).push(t,n,i))}}))})();window.$RC||(window.$RC=e,window.$RM=new Map);if(null!=document.body)"loading"===document.readyState&&r(document.body),n(document.body);else{var o=new MutationObserver((function(){null!=document.body&&("loading"===document.readyState&&r(document.body),n(document.body),o.disconnect())}));o.observe(document.documentElement,{childList:!0})}})();
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(function () {
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function completeBoundary(suspenseBoundaryID, contentID, errorDigest) {
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contentID = document.getElementById(contentID);
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contentID.parentNode.removeChild(contentID);
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var suspenseIdNode = document.getElementById(suspenseBoundaryID);
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if (suspenseIdNode) {
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suspenseBoundaryID = suspenseIdNode.previousSibling;
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if (errorDigest)
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(suspenseBoundaryID.data = "$!"),
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suspenseIdNode.setAttribute("data-dgst", errorDigest);
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else {
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errorDigest = suspenseBoundaryID.parentNode;
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suspenseIdNode = suspenseBoundaryID.nextSibling;
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var depth = 0;
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do {
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if (suspenseIdNode && 8 === suspenseIdNode.nodeType) {
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var data = suspenseIdNode.data;
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if ("/$" === data)
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if (0 === depth) break;
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else depth--;
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else ("$" !== data && "$?" !== data && "$!" !== data) || depth++;
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}
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data = suspenseIdNode.nextSibling;
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errorDigest.removeChild(suspenseIdNode);
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suspenseIdNode = data;
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} while (suspenseIdNode);
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for (; contentID.firstChild; )
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errorDigest.insertBefore(contentID.firstChild, suspenseIdNode);
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suspenseBoundaryID.data = "$";
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}
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suspenseBoundaryID._reactRetry && suspenseBoundaryID._reactRetry();
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}
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}
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function completeBoundaryWithStyles(
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suspenseBoundaryID,
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contentID,
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stylesheetDescriptors
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) {
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for (
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var precedences = new Map(),
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thisDocument = document,
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lastResource,
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node,
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nodes = thisDocument.querySelectorAll(
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"link[data-precedence],style[data-precedence]"
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),
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styleTagsToHoist = [],
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i$0 = 0;
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(node = nodes[i$0++]);
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)
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"not all" === node.getAttribute("media")
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? styleTagsToHoist.push(node)
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: ("LINK" === node.tagName &&
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resourceMap.set(node.getAttribute("href"), node),
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precedences.set(node.dataset.precedence, (lastResource = node)));
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node = 0;
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nodes = [];
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var precedence, resourceEl;
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for (i$0 = !0; ; ) {
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if (i$0) {
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var stylesheetDescriptor = stylesheetDescriptors[node++];
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if (!stylesheetDescriptor) {
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i$0 = !1;
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node = 0;
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continue;
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}
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var avoidInsert = !1,
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j = 0;
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var href = stylesheetDescriptor[j++];
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if ((resourceEl = resourceMap.get(href))) {
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var attr = resourceEl._p;
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avoidInsert = !0;
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} else {
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resourceEl = thisDocument.createElement("link");
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resourceEl.href = href;
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resourceEl.rel = "stylesheet";
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for (
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resourceEl.dataset.precedence = precedence =
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stylesheetDescriptor[j++];
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(attr = stylesheetDescriptor[j++]);
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)
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resourceEl.setAttribute(attr, stylesheetDescriptor[j++]);
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attr = resourceEl._p = new Promise(function (resolve, reject) {
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resourceEl.onload = resolve;
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resourceEl.onerror = reject;
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});
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resourceMap.set(href, resourceEl);
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}
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href = resourceEl.getAttribute("media");
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!attr ||
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"l" === attr.s ||
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(href && !window.matchMedia(href).matches) ||
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nodes.push(attr);
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if (avoidInsert) continue;
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} else {
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resourceEl = styleTagsToHoist[node++];
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if (!resourceEl) break;
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precedence = resourceEl.getAttribute("data-precedence");
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resourceEl.removeAttribute("media");
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}
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avoidInsert = precedences.get(precedence) || lastResource;
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avoidInsert === lastResource && (lastResource = resourceEl);
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precedences.set(precedence, resourceEl);
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avoidInsert
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? avoidInsert.parentNode.insertBefore(
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resourceEl,
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avoidInsert.nextSibling
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)
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: ((avoidInsert = thisDocument.head),
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avoidInsert.insertBefore(resourceEl, avoidInsert.firstChild));
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}
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Promise.all(nodes).then(
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completeBoundary.bind(null, suspenseBoundaryID, contentID, ""),
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completeBoundary.bind(
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null,
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suspenseBoundaryID,
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contentID,
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"Resource failed to load"
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)
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);
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}
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function handleExistingNodes(target) {
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target = target.querySelectorAll("template");
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for (var i = 0; i < target.length; i++) handleNode(target[i]);
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}
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function installFizzInstrObserver(target) {
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function handleMutations(mutations) {
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for (var i = 0; i < mutations.length; i++)
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for (
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var addedNodes = mutations[i].addedNodes, j = 0;
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j < addedNodes.length;
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j++
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)
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addedNodes[j].parentNode && handleNode(addedNodes[j]);
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}
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var fizzInstrObserver = new MutationObserver(handleMutations);
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fizzInstrObserver.observe(target, { childList: !0 });
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window.addEventListener("DOMContentLoaded", function () {
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handleMutations(fizzInstrObserver.takeRecords());
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fizzInstrObserver.disconnect();
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});
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}
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function handleNode(node_) {
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if (1 === node_.nodeType && node_.dataset) {
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var dataset = node_.dataset;
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if (null != dataset.rxi) {
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var errorDigest = dataset.dgst,
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errorMsg = dataset.msg,
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errorStack = dataset.stck,
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errorComponentStack = dataset.cstck,
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suspenseIdNode = document.getElementById(dataset.bid);
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suspenseIdNode &&
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((dataset = suspenseIdNode.previousSibling),
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(dataset.data = "$!"),
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(suspenseIdNode = suspenseIdNode.dataset),
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errorDigest && (suspenseIdNode.dgst = errorDigest),
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errorMsg && (suspenseIdNode.msg = errorMsg),
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errorStack && (suspenseIdNode.stck = errorStack),
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errorComponentStack && (suspenseIdNode.cstck = errorComponentStack),
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dataset._reactRetry && dataset._reactRetry());
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node_.remove();
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} else if (null != dataset.rri)
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completeBoundaryWithStyles(
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dataset.bid,
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dataset.sid,
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JSON.parse(dataset.sty)
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),
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node_.remove();
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else if (null != dataset.rci)
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completeBoundary(dataset.bid, dataset.sid), node_.remove();
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else if (null != dataset.rsi) {
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errorDigest = dataset.pid;
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errorMsg = document.getElementById(dataset.sid);
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errorDigest = document.getElementById(errorDigest);
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for (errorMsg.parentNode.removeChild(errorMsg); errorMsg.firstChild; )
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errorDigest.parentNode.insertBefore(errorMsg.firstChild, errorDigest);
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errorDigest.parentNode.removeChild(errorDigest);
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node_.remove();
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}
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}
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}
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var resourceMap = new Map();
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(function () {
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addEventListener("submit", function (event) {
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if (!event.defaultPrevented) {
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var form = event.target,
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submitter = event.submitter,
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action = form.action,
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formDataSubmitter = submitter;
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if (submitter) {
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var submitterAction = submitter.getAttribute("formAction");
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null != submitterAction &&
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((action = submitterAction), (formDataSubmitter = null));
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}
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"javascript:throw new Error('React form unexpectedly submitted.')" ===
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action &&
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(event.preventDefault(),
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formDataSubmitter
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? ((event = document.createElement("input")),
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(event.name = formDataSubmitter.name),
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(event.value = formDataSubmitter.value),
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formDataSubmitter.parentNode.insertBefore(
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event,
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formDataSubmitter
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),
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(formDataSubmitter = new FormData(form)),
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event.parentNode.removeChild(event))
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: (formDataSubmitter = new FormData(form)),
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(event = form.ownerDocument || form),
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(event.$$reactFormReplay = event.$$reactFormReplay || []).push(
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form,
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submitter,
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formDataSubmitter
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));
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}
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});
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})();
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window.$RC || ((window.$RC = completeBoundary), (window.$RM = new Map()));
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if (null != document.body)
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"loading" === document.readyState &&
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installFizzInstrObserver(document.body),
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handleExistingNodes(document.body);
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else {
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var domBodyObserver = new MutationObserver(function () {
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null != document.body &&
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("loading" === document.readyState &&
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installFizzInstrObserver(document.body),
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handleExistingNodes(document.body),
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domBodyObserver.disconnect());
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});
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domBodyObserver.observe(document.documentElement, { childList: !0 });
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}
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})();
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