{"id":13408,"library":"jstransformer","title":"JSTransformer API Normalization","description":"JSTransformer is a utility package designed to standardize the APIs of various \"jstransformer-*\" packages, which encompass template engines, Markdown parsers, and code compilers. Its core purpose is to provide a consistent interface for methods such as `.render`, `.renderAsync`, `.renderFile`, and `.renderFileAsync`, along with properties like `inputFormats` and `outputFormat`. The current and only stable version is 1.0.0, which was last published over 7 years ago (June 2016). The project appears to be unmaintained, with no recent releases or active development within the `jstransformers` GitHub organization. While it aimed to unify over 100 transformers at its peak, its long-term inactivity means it likely lacks support for modern JavaScript features or recent versions of underlying transformer libraries. Its key differentiator was its API normalization, enabling interchangeability of transformers, but this benefit is significantly diminished by its abandoned status.","status":"abandoned","version":"1.0.0","language":"javascript","source_language":"en","source_url":"https://github.com/jstransformers/jstransformer","tags":["javascript","jstransformer"],"install":[{"cmd":"npm install jstransformer","lang":"bash","label":"npm"},{"cmd":"yarn add jstransformer","lang":"bash","label":"yarn"},{"cmd":"pnpm add jstransformer","lang":"bash","label":"pnpm"}],"dependencies":[{"reason":"This package acts as a wrapper; actual transformation functionality requires installing specific 'jstransformer-something' packages, such as this Markdown transformer.","package":"jstransformer-marked","optional":false}],"imports":[{"note":"This package is CommonJS-only and does not support ES module (ESM) imports. Use `require()`.","wrong":"import transformer from 'jstransformer';","symbol":"transformer","correct":"const transformer = require('jstransformer');"},{"note":"The `jstransformer` utility is a factory function that takes another `jstransformer-*` package as an argument to normalize its API.","wrong":"const markedTransformer = require('jstransformer-marked');","symbol":"markedTransformer","correct":"const markedTransformer = transformer(require('jstransformer-marked'));"},{"note":"Normalized transformers expose `.render`, `.renderAsync`, `.renderFile`, and `.renderFileAsync` methods.","wrong":"markedTransformer(str, options, locals);","symbol":"render","correct":"markedTransformer.render(str, options, locals);"}],"quickstart":{"code":"const transformer = require('jstransformer');\n// You need to install a specific transformer, e.g., 'jstransformer-marked'\n// npm install jstransformer-marked\nconst markedTransformer = transformer(require('jstransformer-marked'));\n\nconst markdownString = 'Some **markdown** content to transform.';\nconst options = {}; // Options for the underlying transformer (e.g., for 'marked')\nconst locals = {}; // Locals for template engines (e.g., Pug, Handlebars)\n\ntry {\n  // Synchronous rendering\n  const result = markedTransformer.render(markdownString, options, locals);\n  console.log('Transformed Body (Sync):', result.body);\n  console.log('Dependencies (Sync):', result.dependencies);\n\n  // Asynchronous rendering (returns a Promise)\n  markedTransformer.renderAsync('Async **markdown** content.', options, locals)\n    .then(asyncResult => {\n      console.log('Transformed Body (Async):', asyncResult.body);\n      console.log('Dependencies (Async):', asyncResult.dependencies);\n    })\n    .catch(error => {\n      console.error('Async render error:', error);\n    });\n} catch (error) {\n  console.error('Sync render error:', error);\n}","lang":"javascript","description":"This quickstart demonstrates how to initialize `jstransformer` with a specific transformer (like `jstransformer-marked`) and use both its synchronous `.render` and asynchronous `.renderAsync` methods to process input strings."},"warnings":[{"fix":"Consider migrating to actively maintained libraries or ensuring a thorough security review of all transitive dependencies if using in production.","message":"The `jstransformer` package, along with many `jstransformer-*` plugins, has been abandoned for over 7 years. This means it lacks updates for modern JavaScript, potential security fixes, or compatibility with newer versions of underlying libraries.","severity":"gotcha","affected_versions":">=1.0.0"},{"fix":"Ensure your project is configured for CommonJS, or use dynamic `import()` if necessary within an ESM environment, though direct `import` syntax will fail.","message":"The package is CommonJS-only (`require()`) and does not support ES Modules (`import`). Using `import` statements will lead to errors in ESM contexts.","severity":"gotcha","affected_versions":">=1.0.0"},{"fix":"Consult the documentation for the specific `jstransformer-*` plugin you are using to understand its capabilities and supported methods before calling them via the normalized API.","message":"The `jstransformer` utility is a wrapper. If the underlying transformer (e.g., `jstransformer-marked`) cannot perform a requested operation (e.g., `renderFile` when it only supports `render`), it may throw an error at runtime.","severity":"gotcha","affected_versions":">=1.0.0"}],"env_vars":null,"last_verified":"2026-04-19T00:00:00.000Z","next_check":"2026-07-18T00:00:00.000Z","problems":[{"fix":"Run `npm install jstransformer-marked` (or the specific transformer you intend to use).","cause":"The `jstransformer` package acts as a wrapper and requires a specific transformer plugin (e.g., `jstransformer-marked`) to be installed separately.","error":"Error: Cannot find module 'jstransformer-marked'"},{"fix":"Verify that the module you are passing to `transformer()` is a properly structured `jstransformer-*` plugin and supports the `render` method. Check the plugin's documentation.","cause":"The module passed to `transformer()` either doesn't implement a `render` method, or it's not a valid `jstransformer-*` compatible module.","error":"TypeError: transformer(...).render is not a function"},{"fix":"Change `import ... from 'jstransformer'` to `const ... = require('jstransformer');` and ensure your project environment supports CommonJS modules.","cause":"Attempting to use `import` syntax with `jstransformer`, which is a CommonJS-only package.","error":"SyntaxError: Cannot use import statement outside a module"}],"ecosystem":"npm","meta_description":null,"install_score":null,"install_tag":null,"quickstart_score":null,"quickstart_tag":null,"pypi_latest":null,"cli_name":"","cli_version":null}