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MIT License
Copyright (c) 2014-present Sebastian McKenzie and other contributors
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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# @babel/plugin-transform-unicode-escapes
> Compile ES2015 Unicode escapes to ES5
See our website [@babel/plugin-transform-unicode-escapes](https://babeljs.io/docs/babel-plugin-transform-unicode-escapes) for more information.
## Install
Using npm:
```sh
npm install --save-dev @babel/plugin-transform-unicode-escapes
```
or using yarn:
```sh
yarn add @babel/plugin-transform-unicode-escapes --dev
```

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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = void 0;
var _helperPluginUtils = require("@babel/helper-plugin-utils");
var _core = require("@babel/core");
var _default = exports.default = (0, _helperPluginUtils.declare)(api => {
api.assertVersion(7);
const surrogate = /[\ud800-\udfff]/g;
const unicodeEscape = /(\\+)u\{([0-9a-fA-F]+)\}/g;
function escape(code) {
{
let str = code.toString(16);
while (str.length < 4) str = "0" + str;
return "\\u" + str;
}
}
function replacer(match, backslashes, code) {
if (backslashes.length % 2 === 0) {
return match;
}
const char = String.fromCodePoint(parseInt(code, 16));
const escaped = backslashes.slice(0, -1) + escape(char.charCodeAt(0));
return char.length === 1 ? escaped : escaped + escape(char.charCodeAt(1));
}
function replaceUnicodeEscapes(str) {
return str.replace(unicodeEscape, replacer);
}
function getUnicodeEscape(str) {
let match;
while (match = unicodeEscape.exec(str)) {
if (match[1].length % 2 === 0) continue;
unicodeEscape.lastIndex = 0;
return match[0];
}
return null;
}
return {
name: "transform-unicode-escapes",
manipulateOptions({
generatorOpts
}) {
var _generatorOpts$jsescO, _generatorOpts$jsescO2;
if (!generatorOpts.jsescOption) {
generatorOpts.jsescOption = {};
}
(_generatorOpts$jsescO2 = (_generatorOpts$jsescO = generatorOpts.jsescOption).minimal) != null ? _generatorOpts$jsescO2 : _generatorOpts$jsescO.minimal = false;
},
visitor: {
Identifier(path) {
const {
node,
key
} = path;
const {
name
} = node;
const replaced = name.replace(surrogate, c => {
return `_u${c.charCodeAt(0).toString(16)}`;
});
if (name === replaced) return;
const str = _core.types.inherits(_core.types.stringLiteral(name), node);
if (key === "key") {
path.replaceWith(str);
return;
}
const {
parentPath,
scope
} = path;
if (parentPath.isMemberExpression({
property: node
}) || parentPath.isOptionalMemberExpression({
property: node
})) {
parentPath.node.computed = true;
path.replaceWith(str);
return;
}
const binding = scope.getBinding(name);
if (binding) {
scope.rename(name, scope.generateUid(replaced));
return;
}
throw path.buildCodeFrameError(`Can't reference '${name}' as a bare identifier`);
},
"StringLiteral|DirectiveLiteral"(path) {
const {
node
} = path;
const {
extra
} = node;
if (extra != null && extra.raw) extra.raw = replaceUnicodeEscapes(extra.raw);
},
TemplateElement(path) {
const {
node,
parentPath
} = path;
const {
value
} = node;
const firstEscape = getUnicodeEscape(value.raw);
if (!firstEscape) return;
const grandParent = parentPath.parentPath;
if (grandParent.isTaggedTemplateExpression()) {
throw path.buildCodeFrameError(`Can't replace Unicode escape '${firstEscape}' inside tagged template literals. You can enable '@babel/plugin-transform-template-literals' to compile them to classic strings.`);
}
value.raw = replaceUnicodeEscapes(value.raw);
}
}
};
});
//# sourceMappingURL=index.js.map

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{
"name": "@babel/plugin-transform-unicode-escapes",
"version": "7.27.1",
"description": "Compile ES2015 Unicode escapes to ES5",
"repository": {
"type": "git",
"url": "https://github.com/babel/babel.git",
"directory": "packages/babel-plugin-transform-unicode-escapes"
},
"license": "MIT",
"publishConfig": {
"access": "public"
},
"main": "./lib/index.js",
"keywords": [
"babel-plugin"
],
"dependencies": {
"@babel/helper-plugin-utils": "^7.27.1"
},
"peerDependencies": {
"@babel/core": "^7.0.0-0"
},
"devDependencies": {
"@babel/core": "^7.27.1",
"@babel/helper-plugin-test-runner": "^7.27.1"
},
"homepage": "https://babel.dev/docs/en/next/babel-plugin-transform-unicode-escapes",
"engines": {
"node": ">=6.9.0"
},
"author": "The Babel Team (https://babel.dev/team)",
"type": "commonjs"
}