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Badge](https://img.shields.io/codacy/grade/9a9ac6f1a2ad4bf68359ff63bf50dc09/master.svg)](https://www.codacy.com/app/andrej.baran/webpack-run-loader?utm_source=github.com\u0026amp;utm_medium=referral\u0026amp;utm_content=andrejbaran/webpack-run-loader\u0026amp;utm_campaign=Badge_Grade)\n[![npm](https://img.shields.io/npm/v/webpack-run-loader.svg)](https://www.npmjs.com/package/webpack-run-loader)\n\n[![gh-issues-open](https://img.shields.io/github/issues/andrejbaran/webpack-run-loader.svg)](https://github.com/andrejbaran/webpack-run-loader/issues)\n[![gh-issues-closed](https://img.shields.io/github/issues-closed/andrejbaran/webpack-run-loader.svg)](https://github.com/andrejbaran/webpack-run-loader/issues?q=is%3Aissue+is%3Aclosed)\n[![gh-pr-open](https://img.shields.io/github/issues-pr/andrejbaran/webpack-run-loader.svg)](https://github.com/andrejbaran/webpack-run-loader/pulls)\n[![gh-pr-closed](https://img.shields.io/github/issues-pr-closed/andrejbaran/webpack-run-loader.svg)](https://github.com/andrejbaran/webpack-run-loader/pulls?q=is%3Apr+is%3Aclosed)\n\n## Info\nA webpack loader that executes function exported by previous loader and exports or returns its result\nor the original function bound to context and arguments.\nIt is a mix of [apply-loader](https://github.com/mogelbrod/apply-loader) and [extract-loader](https://github.com/peerigon/extract-loader). See [Options](#options) for more details.\n\n### Reasoning / Alternatives\nYou probably can get away with using `apply-loader` with `extract-loader`.\nThe reason why this loader was made is a specific scenario where a loader exports a function but\nalso uses imports inside the script (e.g. `pug-loader`). This doesn't play nice with `extract-laoder`\nbecause of the way it replaces imports (as it wasn't meant for this scenario I guess).\n\n## Install\n\n```shell\nnpm i webpack-run-loader\nyarn add webpack-run-loader\n```\n\n## Usage\nFor demonstration purposes let's say a loader uses this script to export a function:\n```js\nconst runtime = require(\"some-runtime\");\n\nmodule.exports = function(optionalArg) {\n    doSomeStuff();\n\n    const context = this.createContext(optionalArg);\n\n    return runtime.yay(context);\n}\n```\n### Options\nYou can specify loader options the regular way in your webpack config:\n```js\n{\n    ...\n    module: {\n        ...\n        {\n            loader: \"webpack-run-loader\",\n            options: {\n                ...\n            }\n        }\n    }\n    ...\n}\n```\n\n* [mode: (\"run\" | \"bind\")](#mode-run--bind)\n* [export: boolean](#export-boolean)\n* [stringify: boolean](#stringify-boolean)\n* [context: (loaderContext) =\u003e any](#context-loadercontext--any)\n* [args: array](#args-array)\n\n### mode: (\"run\" | \"bind\")\nSpecifies the mode of the loader:\n* `run`: Actually runs the exported function and returns/exports its result\n* `bind`: Binds the exported function to optional [context](#context-loadercontext--any)\n  and [args](#args-array) and exports (forces [export](#export-boolean) to `true`) the bound function\n  \nDefault is `run`.\n\n### export: boolean\nSpecifies whether the loader exports or returns the result of exported function.\nDefault is `false`.\n * `true` makes `webpack-run-loader` behave the same way as `apply-loader`.\n Note that `args` option isn't fully compatible\n * `false` makes `webpack-run-loader`behave the same way as `extract-loader` with the exception,\n that it extracts the result of the function call instead of the source of the module.\n\nUsually you want to set export to `true` if you need to further process the result in other loaders\nand you want to set it to `false` if you want to extract the result into a file (e.g. with [file-loader](https://github.com/webpack-contrib/file-loader))\n#### Example (true)\n```js\n{\n    loader: \"webpack-run-loader\",\n    options: {\n        context: (ctx) =\u003e {\n            return {\n                createContext(optionalArg) {\n                    ....\n                }\n            };\n        },\n        export: true\n    }\n}\n\n// webpack-run-laoder will act as a \"pitching\" laoder\n// and returns a script like the one below, same as apply-loader:\n\n...\nvar req = require(/* remaining reuest in the loader chain */);\nmodule.exports = (req[\"default\"] || req).apply(/* context */, /* array of args */);\n\n```\n\n#### Example (false)\n```js\n{\n    loader: \"webpack-run-loader\",\n    options: {\n        context: (ctx) =\u003e {\n            return {\n                createContext(optionalArg) {\n                    ....\n                }\n            };\n        },\n        export: false // default\n    }\n}\n\n// webpack-run-laoder will return the raw result of the exported function.\n\n```\n\nRead more about [loaders](https://webpack.js.org/concepts/loaders/) and [pitching loaders](https://webpack.js.org/api/loaders/#pitching-loader).\n\n### stringify: boolean\nSpecifies whether the exported function's result will be ran through `JSON.stringify` or not. \nDefault is `false`.\n\n### context: (loaderContext) =\u003e any\nFunction that returns context that will be exposed as `this` while running the exported function.\nThis might be useful when you want to return the result of the function (`export false`) and you know the exported function is using `this` and you need to provide it.\n\n#### Signature\n`(loaderContext) =\u003e any` where `loaderContext` is webpack's loader [context](https://webpack.js.org/api/loaders/#the-loader-context)\n#### Example\n```js\n{\n    loader: \"webpack-run-loader\",\n    options: {\n        context: (ctx) =\u003e {\n            return {\n                // we need to provide createContext in order for the script to work\n                createContext(optionalArg) {\n                    ....\n                }\n            };\n        }\n    }\n}\n```\n\n### args: Array\nArray of arguments passed to exported function when executing it.\n#### Example\n```js\n{\n    loader: \"webpack-run-loader\",\n    options: {\n        context: (ctx) =\u003e {\n            return {\n                createContext(optionalArg) {\n                    // optionalArg will be ourOptionalArg\n                    ....\n                }\n            };\n        },\n        args: [ourOptionalArg]\n    }\n}\n```\n\n## Contributing\nAll PRs are welcome! Note that [conventional changlog/standard version](https://github.com/conventional-changelog/standard-version) is used for versioning and commit messages.\n\n## Roadmap\n* More thorough tests\n* Support for scripts using ES import/export declarations\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fandrejbaran%2Fwebpack-run-loader","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fandrejbaran%2Fwebpack-run-loader","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fandrejbaran%2Fwebpack-run-loader/lists"}