[babel 8] Output minimal strings by default (#12675)

Co-authored-by: Justin Ridgewell <justin@ridgewell.name>
Co-authored-by: Justin Ridgewell <jridgewell@google.com>

packages/babel-generator/package.json

@@ -20,7 +20,7 @@
   ],
   "dependencies": {
     "@babel/types": "workspace:^7.12.11",
-    "jsesc": "^2.5.1",
+    "jsesc": "condition: BABEL_8_BREAKING ? ^3.0.2 : ^2.5.1",
     "source-map": "^0.5.0"
   },
   "devDependencies": {

packages/babel-generator/src/generators/types.js

@@ -203,8 +203,6 @@ export function StringLiteral(node: Object) {
     return;
   }
 
-  // ensure the output is ASCII-safe
-
   const val = jsesc(
     node.value,
     process.env.BABEL_8_BREAKING

packages/babel-generator/src/index.js

@@ -55,13 +55,15 @@ function normalizeOptions(code, opts): Format {
     jsescOption: {
       quotes: "double",
       wrap: true,
+      minimal: true,
       ...opts.jsescOption,
     },
     recordAndTupleSyntaxType: opts.recordAndTupleSyntaxType,
   };
 
   if (!process.env.BABEL_8_BREAKING) {
     format.jsonCompatibleStrings = opts.jsonCompatibleStrings;
+    delete format.jsescOption.minimal;
   }
 
   if (format.minified) {

packages/babel-generator/test/fixtures/escapes/jsonEscape/output.js

@@ -1,2 +1,2 @@
 0;// Not a directive
-"\u00A9";
+"©";

packages/babel-generator/test/fixtures/minified/literals-babel-7/input.js

@@ -0,0 +1,18 @@
+5;
+5.0;
+5e1;
+5e4;
+"foobar";
+'\x20';
+"\n\r";
+"😂";
+"\uD83D_\uDE02"
+`😂`;
+/foobar/g;
+null;
+true;
+false;
+5.;
+0b10;
+0o70;
+0X1F;

packages/babel-generator/test/fixtures/minified/literals-babel-7/options.json

@@ -0,0 +1,3 @@
+{
+  "BABEL_8_BREAKING": false
+}

packages/babel-generator/test/fixtures/minified/literals-babel-7/output.js

@@ -0,0 +1 @@
+5;5;50;5e4;"foobar";" ";"\n\r";"\uD83D\uDE02";"\uD83D_\uDE02"`😂`;/foobar/g;null;true;false;5;2;56;31;

packages/babel-generator/test/fixtures/minified/literals/input.js

@@ -6,6 +6,7 @@
 '\x20';
 "\n\r";
 "😂";
+"\uD83D_\uDE02"
 `😂`;
 /foobar/g;
 null;

packages/babel-generator/test/fixtures/minified/literals/options.json

@@ -0,0 +1,3 @@
+{
+  "BABEL_8_BREAKING": true
+}

packages/babel-generator/test/fixtures/minified/literals/output.js

@@ -1 +1 @@
-5;5;50;5e4;"foobar";" ";"\n\r";"\uD83D\uDE02";`😂`;/foobar/g;null;true;false;5;2;56;31;
+5;5;50;5e4;"foobar";" ";"\n\r";"😂";"\uD83D_\uDE02"`😂`;/foobar/g;null;true;false;5;2;56;31;

packages/babel-plugin-transform-react-jsx/test/fixtures/react-automatic/should-escape-xhtml-jsxattribute-babel-7/input.js

@@ -0,0 +1,3 @@
+<div id="wôw" />;
+<div id="\w" />;
+<div id="w &lt; w" />;

packages/babel-plugin-transform-react-jsx/test/fixtures/react-automatic/should-escape-xhtml-jsxattribute-babel-7/options.json

@@ -0,0 +1,3 @@
+{
+  "BABEL_8_BREAKING": false
+}

packages/babel-plugin-transform-react-jsx/test/fixtures/react-automatic/should-escape-xhtml-jsxattribute-babel-7/output.mjs

@@ -0,0 +1,16 @@
+import { jsx as _jsx } from "react/jsx-runtime";
+
+/*#__PURE__*/
+_jsx("div", {
+  id: "w\xF4w"
+});
+
+/*#__PURE__*/
+_jsx("div", {
+  id: "\\w"
+});
+
+/*#__PURE__*/
+_jsx("div", {
+  id: "w < w"
+});

packages/babel-plugin-transform-react-jsx/test/fixtures/react-automatic/should-escape-xhtml-jsxattribute/options.json

@@ -0,0 +1,3 @@
+{
+  "BABEL_8_BREAKING": true
+}

packages/babel-plugin-transform-react-jsx/test/fixtures/react-automatic/should-escape-xhtml-jsxattribute/output.mjs

@@ -2,7 +2,7 @@ import { jsx as _jsx } from "react/jsx-runtime";
 
 /*#__PURE__*/
 _jsx("div", {
-  id: "w\xF4w"
+  id: "wôw"
 });
 
 /*#__PURE__*/

packages/babel-plugin-transform-react-jsx/test/fixtures/react-automatic/should-escape-xhtml-jsxtext-babel-7/input.js

@@ -0,0 +1,12 @@
+<div>wow</div>;
+<div>wôw</div>;
+
+<div>w & w</div>;
+<div>w &amp; w</div>;
+
+<div>w &nbsp; w</div>;
+<div>this should not parse as unicode: \u00a0</div>;
+<div>this should parse as nbsp:   </div>;
+<div>this should parse as unicode: {'\u00a0 '}</div>;
+
+<div>w &lt; w</div>;

packages/babel-plugin-transform-react-jsx/test/fixtures/react-automatic/should-escape-xhtml-jsxtext-babel-7/options.json

@@ -0,0 +1 @@
+{ "BABEL_8_BREAKING": false }

packages/babel-plugin-transform-react-jsx/test/fixtures/react-automatic/should-escape-xhtml-jsxtext-babel-7/output.mjs

@@ -0,0 +1,47 @@
+import { jsx as _jsx } from "react/jsx-runtime";
+import { jsxs as _jsxs } from "react/jsx-runtime";
+
+/*#__PURE__*/
+_jsx("div", {
+  children: "wow"
+});
+
+/*#__PURE__*/
+_jsx("div", {
+  children: "w\xF4w"
+});
+
+/*#__PURE__*/
+_jsx("div", {
+  children: "w & w"
+});
+
+/*#__PURE__*/
+_jsx("div", {
+  children: "w & w"
+});
+
+/*#__PURE__*/
+_jsx("div", {
+  children: "w \xA0 w"
+});
+
+/*#__PURE__*/
+_jsx("div", {
+  children: "this should not parse as unicode: \\u00a0"
+});
+
+/*#__PURE__*/
+_jsx("div", {
+  children: "this should parse as nbsp: \xA0 "
+});
+
+/*#__PURE__*/
+_jsxs("div", {
+  children: ["this should parse as unicode: ", '\u00a0 ']
+});
+
+/*#__PURE__*/
+_jsx("div", {
+  children: "w < w"
+});

packages/babel-plugin-transform-react-jsx/test/fixtures/react-automatic/should-escape-xhtml-jsxtext/options.json

@@ -0,0 +1 @@
+{ "BABEL_8_BREAKING": true }

packages/babel-plugin-transform-react-jsx/test/fixtures/react-automatic/should-escape-xhtml-jsxtext/output.mjs

@@ -8,7 +8,7 @@ _jsx("div", {
 
 /*#__PURE__*/
 _jsx("div", {
-  children: "w\xF4w"
+  children: "wôw"
 });
 
 /*#__PURE__*/

packages/babel-plugin-transform-react-jsx/test/fixtures/react/should-escape-xhtml-jsxattribute-babel-7/input.js

@@ -0,0 +1,3 @@
+<div id="wôw" />;
+<div id="\w" />;
+<div id="w &lt; w" />;

packages/babel-plugin-transform-react-jsx/test/fixtures/react/should-escape-xhtml-jsxattribute-babel-7/options.json

@@ -0,0 +1,3 @@
+{
+  "BABEL_8_BREAKING": false
+}

packages/babel-plugin-transform-react-jsx/test/fixtures/react/should-escape-xhtml-jsxattribute-babel-7/output.js

@@ -0,0 +1,14 @@
+/*#__PURE__*/
+React.createElement("div", {
+  id: "w\xF4w"
+});
+
+/*#__PURE__*/
+React.createElement("div", {
+  id: "\\w"
+});
+
+/*#__PURE__*/
+React.createElement("div", {
+  id: "w < w"
+});

packages/babel-plugin-transform-react-jsx/test/fixtures/react/should-escape-xhtml-jsxattribute/options.json

@@ -0,0 +1,3 @@
+{
+  "BABEL_8_BREAKING": true
+}

packages/babel-plugin-transform-react-jsx/test/fixtures/react/should-escape-xhtml-jsxattribute/output.js

@@ -1,6 +1,6 @@
 /*#__PURE__*/
 React.createElement("div", {
-  id: "w\xF4w"
+  id: "wôw"
 });
 
 /*#__PURE__*/

packages/babel-plugin-transform-react-jsx/test/fixtures/react/should-escape-xhtml-jsxtext-babel-7/input.js

@@ -0,0 +1,12 @@
+<div>wow</div>;
+<div>wôw</div>;
+
+<div>w & w</div>;
+<div>w &amp; w</div>;
+
+<div>w &nbsp; w</div>;
+<div>this should not parse as unicode: \u00a0</div>;
+<div>this should parse as nbsp:   </div>;
+<div>this should parse as unicode: {'\u00a0 '}</div>;
+
+<div>w &lt; w</div>;

packages/babel-plugin-transform-react-jsx/test/fixtures/react/should-escape-xhtml-jsxtext-babel-7/options.json

@@ -0,0 +1,3 @@
+{
+  "BABEL_8_BREAKING": false
+}

packages/babel-plugin-transform-react-jsx/test/fixtures/react/should-escape-xhtml-jsxtext-babel-7/output.js

@@ -0,0 +1,26 @@
+/*#__PURE__*/
+React.createElement("div", null, "wow");
+
+/*#__PURE__*/
+React.createElement("div", null, "w\xF4w");
+
+/*#__PURE__*/
+React.createElement("div", null, "w & w");
+
+/*#__PURE__*/
+React.createElement("div", null, "w & w");
+
+/*#__PURE__*/
+React.createElement("div", null, "w \xA0 w");
+
+/*#__PURE__*/
+React.createElement("div", null, "this should not parse as unicode: \\u00a0");
+
+/*#__PURE__*/
+React.createElement("div", null, "this should parse as nbsp: \xA0 ");
+
+/*#__PURE__*/
+React.createElement("div", null, "this should parse as unicode: ", '\u00a0 ');
+
+/*#__PURE__*/
+React.createElement("div", null, "w < w");

packages/babel-plugin-transform-react-jsx/test/fixtures/react/should-escape-xhtml-jsxtext/options.json

@@ -0,0 +1,3 @@
+{
+  "BABEL_8_BREAKING": true
+}

packages/babel-plugin-transform-react-jsx/test/fixtures/react/should-escape-xhtml-jsxtext/output.js

@@ -2,7 +2,7 @@
 React.createElement("div", null, "wow");
 
 /*#__PURE__*/
-React.createElement("div", null, "w\xF4w");
+React.createElement("div", null, "wôw");
 
 /*#__PURE__*/
 React.createElement("div", null, "w & w");

packages/babel-plugin-transform-template-literals/test/fixtures/default/tag-with-unicode-escapes-babel-7/input.js

@@ -0,0 +1 @@
+var foo = bar`\u0061\u{0061}\ud835\udc9c\u{1d49c}`;

packages/babel-plugin-transform-template-literals/test/fixtures/default/tag-with-unicode-escapes-babel-7/options.json

@@ -0,0 +1,3 @@
+{
+  "BABEL_8_BREAKING": false
+}

packages/babel-plugin-transform-template-literals/test/fixtures/default/tag-with-unicode-escapes-babel-7/output.js

@@ -0,0 +1,5 @@
+var _templateObject;
+
+function _taggedTemplateLiteral(strings, raw) { if (!raw) { raw = strings.slice(0); } return Object.freeze(Object.defineProperties(strings, { raw: { value: Object.freeze(raw) } })); }
+
+var foo = bar(_templateObject || (_templateObject = _taggedTemplateLiteral(["aa\uD835\uDC9C\uD835\uDC9C"], ["\\u0061\\u{0061}\\ud835\\udc9c\\u{1d49c}"])));

packages/babel-plugin-transform-template-literals/test/fixtures/default/tag-with-unicode-escapes/options.json

@@ -0,0 +1,3 @@
+{
+  "BABEL_8_BREAKING": true
+}

packages/babel-plugin-transform-template-literals/test/fixtures/default/tag-with-unicode-escapes/output.js

@@ -2,4 +2,4 @@ var _templateObject;
 
 function _taggedTemplateLiteral(strings, raw) { if (!raw) { raw = strings.slice(0); } return Object.freeze(Object.defineProperties(strings, { raw: { value: Object.freeze(raw) } })); }
 
-var foo = bar(_templateObject || (_templateObject = _taggedTemplateLiteral(["aa\uD835\uDC9C\uD835\uDC9C"], ["\\u0061\\u{0061}\\ud835\\udc9c\\u{1d49c}"])));
+var foo = bar(_templateObject || (_templateObject = _taggedTemplateLiteral(["aa𝒜𝒜"], ["\\u0061\\u{0061}\\ud835\\udc9c\\u{1d49c}"])));

packages/babel-plugin-transform-unicode-escapes/src/index.js

@@ -42,6 +42,15 @@ export default declare(api => {
 
   return {
     name: "transform-unicode-escapes",
+    manipulateOptions({ generatorOpts }) {
+      // Babel 8 will enable jsesc minimal mode by default, which outputs
+      // unescaped unicode string
+      if (!generatorOpts.jsescOption) {
+        generatorOpts.jsescOption = {};
+      }
+      // $FlowIgnore: Flow does not support logical assignment
+      generatorOpts.jsescOption.minimal ??= false;
+    },
     visitor: {
       Identifier(path) {
         const { node, key } = path;

yarn.lock

@@ -251,7 +251,7 @@ __metadata:
     "@babel/helper-fixtures": "workspace:*"
     "@babel/parser": "workspace:*"
     "@babel/types": "workspace:^7.12.11"
-    jsesc: ^2.5.1
+    jsesc: "condition: BABEL_8_BREAKING ? ^3.0.2 : ^2.5.1"
     source-map: ^0.5.0
   languageName: unknown
   linkType: soft
@@ -9210,7 +9210,7 @@ fsevents@^1.2.7:
   languageName: node
   linkType: hard
 
-"jsesc@npm:^2.5.1":
+"jsesc-BABEL_8_BREAKING-false@npm:jsesc@^2.5.1, jsesc@npm:^2.5.1":
   version: 2.5.2
   resolution: "jsesc@npm:2.5.2"
   bin:
@@ -9219,6 +9219,25 @@ fsevents@^1.2.7:
   languageName: node
   linkType: hard
 
+"jsesc-BABEL_8_BREAKING-true@npm:jsesc@^3.0.2":
+  version: 3.0.2
+  resolution: "jsesc@npm:3.0.2"
+  bin:
+    jsesc: bin/jsesc
+  checksum: 809c7663241f76c42528e2706f011d43c0eaa19b50a5d6f4015b4b9563292c0ffad1f5b12a9a41b71e2206efc5ae3632e8b27c35cb3ef508c0a58a3bb011da90
+  languageName: node
+  linkType: hard
+
+"jsesc@condition: BABEL_8_BREAKING ? ^3.0.2 : ^2.5.1":
+  version: 0.0.0-condition-31d9b4
+  resolution: "jsesc@condition:BABEL_8_BREAKING?^3.0.2:^2.5.1#31d9b4"
+  dependencies:
+    jsesc-BABEL_8_BREAKING-false: "npm:jsesc@^2.5.1"
+    jsesc-BABEL_8_BREAKING-true: "npm:jsesc@^3.0.2"
+  checksum: d6751e397e85958087fffcb6fbe5892902d2455e98ff0d69b69d0b15103892465d60aa0d750199a5d45cca75bbd89c4854b80ef4cbb98b229e3e9fa4e567d968
+  languageName: node
+  linkType: hard
+
 "jsesc@npm:~0.5.0":
   version: 0.5.0
   resolution: "jsesc@npm:0.5.0"