Add esm build. Fixes #2371

package.json

@@ -3,6 +3,7 @@
   "version": "8.13.2",
   "description": "Markdownish syntax for generating flowcharts, sequence diagrams, class diagrams, gantt charts and git graphs.",
   "main": "dist/mermaid.core.js",
+  "module": "dist/mermaid.esm.min.js",
   "keywords": [
     "diagram",
     "markdown",
@@ -14,10 +15,12 @@
   ],
   "scripts": {
     "build:development": "webpack --progress --color",
-    "build:production": "yarn build:development --mode production --config webpack.config.prod.babel.js",
-    "build": "yarn build:development && yarn build:production",
+    "build:umd": "yarn build:development --mode production --config webpack.config.prod.babel.js",
+    "build:esm": "yarn build:development --mode production --config webpack.config.prod.esm.babel.js",
+    "build:production": "concurrently \"yarn build:umd\" \"yarn build:esm\"",
+    "build": "concurrently \"yarn build:development\" \"yarn build:production\"",
     "postbuild": "documentation build src/mermaidAPI.js src/config.js src/defaultConfig.js --shallow -f md --markdown-toc false > docs/Setup.md",
-    "build:watch": "yarn build --watch",
+    "build:watch": "yarn build:development --watch",
     "release": "yarn build",
     "lint": "eslint src",
     "e2e:depr": "yarn lint && jest e2e --config e2e/jest.config.js",
@@ -67,6 +70,7 @@
     "@percy/migrate": "^0.11.0",
     "babel-jest": "^27.0.6",
     "babel-loader": "^8.2.2",
+    "concurrently": "^6.2.2",
     "coveralls": "^3.0.2",
     "css-to-string-loader": "^0.1.3",
     "cypress": "8.5.0",
@@ -101,4 +105,4 @@
       "pre-push": "yarn test"
     }
   }
-}
+}

webpack.config.prod.esm.babel.js

@@ -0,0 +1,13 @@
+import { jsConfig } from './webpack.config.base';
+
+const minConfig = jsConfig();
+minConfig.mode = 'production';
+minConfig.output.library = {
+  type: 'module',
+};
+minConfig.experiments = {
+  outputModule: true,
+};
+minConfig.output.filename = '[name].esm.min.js';
+
+export default [minConfig];

yarn.lock

@@ -3253,6 +3253,20 @@ concat-stream@~1.5.0:
     readable-stream "~2.0.0"
     typedarray "~0.0.5"
 
+concurrently@^6.2.2:
+  version "6.2.2"
+  resolved "https://registry.yarnpkg.com/concurrently/-/concurrently-6.2.2.tgz#81c11b85d9a7de56ad4388ff6aab4a94ddea51f2"
+  integrity sha512-7a45BjVakAl3pprLOeqaOoZfIWZRmdC68NkjyzPbKu0/pE6CRmqS3l8RG7Q2cX9LnRHkB0oPM6af8PS7NEQvYQ==
+  dependencies:
+    chalk "^4.1.0"
+    date-fns "^2.16.1"
+    lodash "^4.17.21"
+    rxjs "^6.6.3"
+    spawn-command "^0.0.2-1"
+    supports-color "^8.1.0"
+    tree-kill "^1.2.2"
+    yargs "^16.2.0"
+
 connect-history-api-fallback@^1.6.0:
   version "1.6.0"
   resolved "https://registry.yarnpkg.com/connect-history-api-fallback/-/connect-history-api-fallback-1.6.0.tgz#8b32089359308d111115d81cad3fceab888f97bc"
@@ -4122,6 +4136,11 @@ data-urls@^2.0.0:
     whatwg-mimetype "^2.3.0"
     whatwg-url "^8.0.0"
 
+date-fns@^2.16.1:
+  version "2.24.0"
+  resolved "https://registry.yarnpkg.com/date-fns/-/date-fns-2.24.0.tgz#7d86dc0d93c87b76b63d213b4413337cfd1c105d"
+  integrity sha512-6ujwvwgPID6zbI0o7UbURi2vlLDR9uP26+tW6Lg+Ji3w7dd0i3DOcjcClLjLPranT60SSEFBwdSyYwn/ZkPIuw==
+
 dateformat@^3.0.0:
   version "3.0.3"
   resolved "https://registry.yarnpkg.com/dateformat/-/dateformat-3.0.3.tgz#a6e37499a4d9a9cf85ef5872044d62901c9889ae"
@@ -8951,7 +8970,7 @@ rw@1:
   resolved "https://registry.yarnpkg.com/rw/-/rw-1.3.3.tgz#3f862dfa91ab766b14885ef4d01124bfda074fb4"
   integrity sha1-P4Yt+pGrdmsUiF700BEkv9oHT7Q=
 
-rxjs@^6.6.6, rxjs@^6.6.7:
+rxjs@^6.6.3, rxjs@^6.6.6, rxjs@^6.6.7:
   version "6.6.7"
   resolved "https://registry.yarnpkg.com/rxjs/-/rxjs-6.6.7.tgz#90ac018acabf491bf65044235d5863c4dab804c9"
   integrity sha512-hTdwr+7yYNIT5n4AMYp85KA6yw2Va0FLa3Rguvbpa4W3I5xynaBZo41cM3XM+4Q6fRMj3sBYIR1VAmZMXYJvRQ==
@@ -9298,6 +9317,11 @@ space-separated-tokens@^1.0.0:
   resolved "https://registry.yarnpkg.com/space-separated-tokens/-/space-separated-tokens-1.1.5.tgz#85f32c3d10d9682007e917414ddc5c26d1aa6899"
   integrity sha512-q/JSVd1Lptzhf5bkYm4ob4iWPjx0KiRe3sRFBNrVqbJkFaBm5vbbowy1mymoPNLRa52+oadOhJ+K49wsSeSjTA==
 
+spawn-command@^0.0.2-1:
+  version "0.0.2-1"
+  resolved "https://registry.yarnpkg.com/spawn-command/-/spawn-command-0.0.2-1.tgz#62f5e9466981c1b796dc5929937e11c9c6921bd0"
+  integrity sha1-YvXpRmmBwbeW3Fkpk34RycaSG9A=
+
 spdx-correct@^3.0.0:
   version "3.1.1"
   resolved "https://registry.yarnpkg.com/spdx-correct/-/spdx-correct-3.1.1.tgz#dece81ac9c1e6713e5f7d1b6f17d468fa53d89a9"
@@ -9646,7 +9670,7 @@ supports-color@^7.0.0, supports-color@^7.1.0:
   dependencies:
     has-flag "^4.0.0"
 
-supports-color@^8.0.0, supports-color@^8.1.1:
+supports-color@^8.0.0, supports-color@^8.1.0, supports-color@^8.1.1:
   version "8.1.1"
   resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-8.1.1.tgz#cd6fc17e28500cff56c1b86c0a7fd4a54a73005c"
   integrity sha512-MpUEN2OodtUzxvKQl72cUF7RQ5EiHsGvSsVG0ia9c5RbWGL2CI4C7EpPS8UTBIplnlzZiNuV56w+FuNxy3ty2Q==
@@ -9886,6 +9910,11 @@ tr46@^2.1.0:
   dependencies:
     punycode "^2.1.1"
 
+tree-kill@^1.2.2:
+  version "1.2.2"
+  resolved "https://registry.yarnpkg.com/tree-kill/-/tree-kill-1.2.2.tgz#4ca09a9092c88b73a7cdc5e8a01b507b0790a0cc"
+  integrity sha512-L0Orpi8qGpRG//Nd+H90vFB+3iHnue1zSSGmNOOCh1GLJ7rUKVwV2HvijphGQS2UmhUZewS9VgvxYIdgr+fG1A==
+
 trim-lines@^1.0.0:
   version "1.1.3"
   resolved "https://registry.yarnpkg.com/trim-lines/-/trim-lines-1.1.3.tgz#839514be82428fd9e7ec89e35081afe8f6f93115"