[core] Minify error messages in production

.circleci/config.yml

@@ -124,6 +124,11 @@ jobs:
       - run:
           name: Lint
           command: yarn lint:ci
+      - run:
+          name: '`yarn extract-error-codes` changes committed?'
+          command: |
+            yarn extract-error-codes
+            git diff --exit-code
       - run:
           name: Lint JSON
           command: yarn --silent jsonlint

.eslintrc.js

@@ -44,7 +44,11 @@ module.exports = {
     'no-restricted-imports': [
       'error',
       {
-        patterns: ['@material-ui/*/*/*', '!@material-ui/core/test-utils/*'],
+        patterns: [
+          '@material-ui/*/*/*',
+          '!@material-ui/core/test-utils/*',
+          '!@material-ui/utils/macros/*.macro',
+        ],
       },
     ],
     'nonblock-statement-body-position': 'error',

babel.config.js

@@ -1,3 +1,8 @@
+const path = require('path');
+
+const errorCodesPath = path.resolve(__dirname, './docs/public/static/error-codes.json');
+const missingError = process.env.MUI_EXTRACT_ERROR_CODES === 'true' ? 'write' : 'annotate';
+
 let defaultPresets;
 
 // We release a ES version of Material-UI.
@@ -42,6 +47,15 @@ const productionPlugins = [
 module.exports = {
   presets: defaultPresets.concat(['@babel/preset-react', '@babel/preset-typescript']),
   plugins: [
+    [
+      'babel-plugin-macros',
+      {
+        muiError: {
+          errorCodesPath,
+          missingError,
+        },
+      },
+    ],
     'babel-plugin-optimize-clsx',
     ['@babel/plugin-proposal-class-properties', { loose: true }],
     ['@babel/plugin-proposal-object-rest-spread', { loose: true }],

docs/babel.config.js

@@ -1,5 +1,8 @@
 const bpmr = require('babel-plugin-module-resolver');
 const fse = require('fs-extra');
+const path = require('path');
+
+const errorCodesPath = path.resolve(__dirname, './public/static/error-codes.json');
 
 function resolvePath(sourcePath, currentFile, opts) {
   if (sourcePath === 'markdown') {
@@ -33,6 +36,14 @@ module.exports = {
     ['next/babel', { 'transform-runtime': { corejs: 2, version: transformRuntimeVersion } }],
   ],
   plugins: [
+    [
+      'babel-plugin-macros',
+      {
+        muiError: {
+          errorCodesPath,
+        },
+      },
+    ],
     'babel-plugin-optimize-clsx',
     // for IE 11 support
     '@babel/plugin-transform-object-assign',

docs/pages/production-error.js

@@ -0,0 +1,20 @@
+import React from 'react';
+import MarkdownDocs from 'docs/src/modules/components/MarkdownDocs';
+import { prepareMarkdown } from 'docs/src/modules/utils/parseMarkdown';
+
+const pageFilename = 'production-error';
+const requireDemo = require.context('docs/src/pages/production-error', false, /\.js$/);
+const requireRaw = require.context(
+  '!raw-loader!../src/pages/production-error',
+  false,
+  /\.(js|md)$/,
+);
+
+export default function Page({ demos, docs }) {
+  return <MarkdownDocs demos={demos} disableAd docs={docs} requireDemo={requireDemo} />;
+}
+
+Page.getInitialProps = () => {
+  const { demos, docs } = prepareMarkdown({ pageFilename, requireRaw });
+  return { demos, docs };
+};

docs/public/static/error-codes.json

@@ -0,0 +1,9 @@
+{
+  "1": "Material-UI: Expected valid input target. Did you use a custom `inputComponent` and forget to forward refs? See https://material-ui.com/r/input-component-ref-interface for more info.",
+  "2": "Material-UI: The `value` prop must be an array when using the `Select` component with `multiple`.",
+  "3": "Material-UI: Unsupported `%s` color.\nWe support the following formats: #nnn, #nnnnnn, rgb(), rgba(), hsl(), hsla().",
+  "4": "Material-UI: The color provided to augmentColor(color) is invalid.\nThe color object needs to have a `main` property or a `%s` property.",
+  "5": "Material-UI: The color provided to augmentColor(color) is invalid.\n`color.main` should be a string, but `%s` was provided instead.\n\nDid you intend to use one of the following approaches?\n\nimport { green } from \"@material-ui/core/colors\";\n\nconst theme1 = createMuiTheme({ palette: {\n  primary: green,\n} });\n\nconst theme2 = createMuiTheme({ palette: {\n  primary: { main: green[500] },\n} });",
+  "6": "Material-UI: Unsupported non-unitless line height with grid alignment.\nUse unitless line heights instead.",
+  "7": "Material-UI: capitalize(string) expects a string argument."
+}

docs/src/modules/components/AppFrame.js

@@ -188,7 +188,7 @@ function AppFrame(props) {
   let navIconClassName = '';
   let appBarClassName = classes.appBar;
 
-  if (!activePage || activePage.disableDrawer === true) {
+  if (activePage?.disableDrawer === true) {
     disablePermanent = true;
     appBarClassName += ` ${classes.appBarHome}`;
   } else {

docs/src/modules/components/MarkdownDocs.js

@@ -89,7 +89,7 @@ const styles = (theme) => ({
 });
 
 function MarkdownDocs(props) {
-  const { classes, disableAd = false, disableToc = false, demos, docs, requireDemo } = props;
+  const { classes, disableAd = false, disableToc = false, demos = {}, docs, requireDemo } = props;
 
   const t = useSelector((state) => state.options.t);
   const userLanguage = useSelector((state) => state.options.userLanguage);
@@ -100,7 +100,7 @@ function MarkdownDocs(props) {
 
   const { activePage, pages } = React.useContext(PageContext);
   const pageList = flattenPages(pages);
-  const currentPageNum = findIndex(pageList, (page) => page.pathname === activePage.pathname);
+  const currentPageNum = findIndex(pageList, (page) => page.pathname === activePage?.pathname);
   const currentPage = pageList[currentPageNum];
   const prevPage = pageList[currentPageNum - 1];
   const nextPage = pageList[currentPageNum + 1];

docs/src/pages/production-error/ErrorDecoder.js

@@ -0,0 +1,126 @@
+import * as React from 'react';
+import { useRouter } from 'next/router';
+import Link from '@material-ui/core/Link';
+import Typography from '@material-ui/core/Typography';
+import { styled } from '@material-ui/core/styles';
+import MarkdownElement from 'docs/src/modules/components/MarkdownElement';
+import { render as renderMarkdown } from 'docs/src/modules/utils/parseMarkdown';
+
+const ErrorMessageSection = styled('div')({
+  // reset display: block from Demo
+  display: 'block',
+});
+
+// use elevation={2}
+const ErrorMessageMarkdown = styled(MarkdownElement)(({ theme }) => {
+  return {
+    boxShadow: theme.shadows['2'],
+    color: theme.palette.error.main,
+    padding: theme.spacing(1, 2),
+  };
+});
+
+export default function ErrorDecoder() {
+  const {
+    query: { code, ...query },
+  } = useRouter();
+  const queryArgs = query['args[]'];
+  const args = React.useMemo(() => (Array.isArray(queryArgs) ? queryArgs : [queryArgs]), [
+    queryArgs,
+  ]);
+
+  const [data, dispatch] = React.useReducer(
+    (previousState, action) => {
+      switch (action.type) {
+        case 'rejected':
+          return { errorCodes: null, state: 'rejected' };
+        case 'resolved':
+          return { errorCodes: action.payload, state: 'resolved' };
+        default:
+          throw new Error(`We made a mistake passing an unknown action.`);
+      }
+    },
+    { errorCodes: null, state: 'loading' },
+  );
+
+  React.useEffect(() => {
+    let cancelled = false;
+
+    fetch('/static/error-codes.json')
+      .then((response) => {
+        return response.json();
+      })
+      .then((json) => {
+        if (cancelled === false) {
+          dispatch({ type: 'resolved', payload: json });
+        }
+      })
+      .catch(() => {
+        dispatch({ type: 'rejected' });
+      });
+
+    return () => {
+      cancelled = true;
+    };
+  }, []);
+
+  const errorMessage = React.useMemo(() => {
+    const rawMessage = data.errorCodes?.[code];
+    if (rawMessage === undefined) {
+      return undefined;
+    }
+
+    let replacementIndex = -1;
+    const readableMessage = rawMessage.replace(/%s/g, () => {
+      replacementIndex += 1;
+      const dangerousArgument = args[replacementIndex];
+      if (dangerousArgument === undefined) {
+        return '[missing argument]';
+      }
+      // String will be injected into innerHTML.
+      // We need to escape first
+      // https://developer.mozilla.org/en-US/docs/Web/API/Element/innerHTML#Security_considerations
+      const div = document.createElement('div');
+      div.innerText = dangerousArgument;
+      return div.innerHTML;
+    });
+
+    return renderMarkdown(readableMessage);
+  }, [args, code, data.errorCodes]);
+
+  if (data.state === 'loading') {
+    return <Typography>Loading error codes</Typography>;
+  }
+
+  if (data.state === 'rejected') {
+    return (
+      <Typography color="error">
+        Seems like we&apos;re having some issues loading the original message. Try reloading the
+        page. If the error persists please report this isse on our{' '}
+        <Link
+          href="https://github.com/mui-org/material-ui/issues/new?template=1.bug.md"
+          target="_blank"
+        >
+          issue tracker
+        </Link>
+        .
+      </Typography>
+    );
+  }
+
+  if (errorMessage === undefined) {
+    return (
+      <Typography>
+        When you encounter an error, you&apos;ll receive a link to this page for that specific error
+        and we&apos;ll show you the full error text.
+      </Typography>
+    );
+  }
+
+  return (
+    <ErrorMessageSection>
+      <p>The original text of the error you encountered:</p>
+      <ErrorMessageMarkdown renderedMarkdown={errorMessage} />
+    </ErrorMessageSection>
+  );
+}

docs/src/pages/production-error/index.md

@@ -0,0 +1,9 @@
+# Production Error
+
+<p class="description">In the production build of Material-UI error messages are minified to reduce the size of your application.</p>
+
+We recommend using the development build when debugging this error.
+It will include additional warnings about potential problems.
+If you encounter an exception while using the production build, this page will reassemble the orrigianl text of the error.
+
+{{"demo": "pages/production-error/ErrorDecoder.js", "hideToolbar": true, "bg": "inline"}}

package.json

@@ -21,6 +21,7 @@
     "docs:typescript:check": "yarn workspace docs typescript",
     "docs:typescript:formatted": "yarn workspace docs typescript:transpile",
     "docs:mdicons:synonyms": "babel-node --config-file ./babel.config.js ./docs/scripts/updateIconSynonyms",
+    "extract-error-codes": "lerna run --parallel extract-error-codes",
     "framer:build": "yarn workspace framer build",
     "jsonlint": "node scripts/jsonlint.js",
     "lint": "eslint . --cache --report-unused-disable-directives",
@@ -74,6 +75,7 @@
     "babel-eslint": "^10.0.3",
     "babel-loader": "^8.0.0",
     "babel-plugin-istanbul": "^6.0.0",
+    "babel-plugin-macros": "^2.8.0",
     "babel-plugin-module-resolver": "^4.0.0",
     "babel-plugin-optimize-clsx": "^2.3.0",
     "babel-plugin-react-remove-properties": "^0.3.0",