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Kaitai Struct: runtime library for JavaScript\n\n[![npm@latest](https://img.shields.io/npm/v/kaitai-struct/latest)](https://www.npmjs.com/package/kaitai-struct/v/latest)\n[![npm@next](https://img.shields.io/npm/v/kaitai-struct/next)](https://www.npmjs.com/package/kaitai-struct/v/next)\n[![downloads](https://img.shields.io/npm/dw/kaitai-struct)](https://www.npmtrends.com/kaitai-struct)\n\nThis library implements Kaitai Struct API for JavaScript.\n\nKaitai Struct is a declarative language used for describe various binary\ndata structures, laid out in files or in memory: i.e. binary file\nformats, network stream packet formats, etc.\n\nFurther reading:\n\n* [About Kaitai Struct](https://kaitai.io/)\n* [About API implemented in this library](https://doc.kaitai.io/stream_api.html)\n* [JavaScript-specific notes](https://doc.kaitai.io/lang_javascript.html) - also includes Quick start guide\n\n## Development\n\nAfter cloning this repository, you must run these commands to compile the\nTypeScript source file [`KaitaiStream.ts`](./KaitaiStream.ts) into the\n`KaitaiStream.js` file (ignored by Git) with JavaScript code:\n\n```shell\nnpm install\nnpm run build\n```\n\n`npm run build` also needs to be run after each change to\n[`KaitaiStream.ts`](./KaitaiStream.ts).\n\n## Licensing\n\nCopyright 2012-2016 Ilmari Heikkinen\\\nCopyright 2016-2025 Kaitai Project\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the 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