{"id":15548521,"url":"https://github.com/zachleat/esm-import-transformer","last_synced_at":"2025-10-29T19:39:00.277Z","repository":{"id":37625347,"uuid":"499621480","full_name":"zachleat/esm-import-transformer","owner":"zachleat","description":"Change import URLs in JavaScript code using import maps. e.g. `import * from \"before\"` to `import * from \"after\"`","archived":false,"fork":false,"pushed_at":"2025-04-17T17:10:20.000Z","size":26,"stargazers_count":24,"open_issues_count":0,"forks_count":1,"subscribers_count":3,"default_branch":"main","last_synced_at":"2025-05-27T01:19:15.781Z","etag":null,"topics":[],"latest_commit_sha":null,"homepage":null,"language":"JavaScript","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":null,"status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/zachleat.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":null,"code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null,"zenodo":null}},"created_at":"2022-06-03T19:01:52.000Z","updated_at":"2025-04-17T17:10:23.000Z","dependencies_parsed_at":"2023-12-14T03:27:18.341Z","dependency_job_id":"d0f079bb-657b-4c97-93cd-e5bcd7e79238","html_url":"https://github.com/zachleat/esm-import-transformer","commit_stats":{"total_commits":8,"total_committers":2,"mean_commits":4.0,"dds":0.125,"last_synced_commit":"7aefc099bacfb93cd4f42161b407fc44e875de5d"},"previous_names":[],"tags_count":7,"template":false,"template_full_name":null,"purl":"pkg:github/zachleat/esm-import-transformer","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/zachleat%2Fesm-import-transformer","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/zachleat%2Fesm-import-transformer/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/zachleat%2Fesm-import-transformer/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/zachleat%2Fesm-import-transformer/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/zachleat","download_url":"https://codeload.github.com/zachleat/esm-import-transformer/tar.gz/refs/heads/main","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/zachleat%2Fesm-import-transformer/sbom","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":263632057,"owners_count":23491530,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":[],"created_at":"2024-10-02T13:21:56.130Z","updated_at":"2025-10-29T19:39:00.272Z","avatar_url":"https://github.com/zachleat.png","language":"JavaScript","funding_links":[],"categories":[],"sub_categories":[],"readme":"# esm-import-transformer\n\nCan transform any ESM source code `import` URLs using an import maps object. This package works in ESM or CJS.\n\n```js\n// Input source code:\nimport {html, css, LitElement} from \"lit\";\n\n// Transform with an import map:\nimport {html, css, LitElement} from \"https://cdn.jsdelivr.net/gh/lit/dist@2/core/lit-core.min.js\";\n\n// Or transform to a dynamic import:\nconst {html, css, LitElement} = await import(\"lit\");\n\n// Or transform to CommonJS require:\nconst {html, css, LitElement} = require(\"lit\");\n```\n\n## Usage\n\n```js\n// ESM\nimport { ImportTransformer } from \"esm-import-transformer\";\n\n// or CJS\nconst { ImportTransformer } = await import(\"esm-import-transformer\");\n```\n\n### Transform with an import map\n\nPass in a source code string and an [import maps](https://github.com/WICG/import-maps) object.\n\n```js\nlet sourceCode = `import {html, css, LitElement} from \"lit\";`;\nlet it = new ImportTransformer(sourceCode);\n\nlet importMap = {\n  imports: {\n    lit: \"https://cdn.jsdelivr.net/gh/lit/dist@2/core/lit-core.min.js\"\n  }\n};\nlet outputCode = it.transformWithImportMap(importMap);\n// returns: `import {html, css, LitElement} from \"https://cdn.jsdelivr.net/gh/lit/dist@2/core/lit-core.min.js\";`\n```\n\n### Transform to dynamic `import()`\n\n```js\nlet sourceCode = `import {html, css, LitElement} from \"lit\";`;\nlet it = new ImportTransformer(sourceCode);\n\nlet outputCode = it.transformToDynamicImport();\n// returns: `const {html, css, LitElement} = await import(\"lit\");`\n```\n\n### Transform to `require()`\n\n_Added in v3.0.1_: This method does _not_ require that the downstream package is CommonJS, but remember that _running_ the resulting code will fail if you try to `require` an ESM package (in some JavaScript environments, e.g. Node \u003c 20).\n\n```js\nlet sourceCode = `import {html, css, LitElement} from \"lit\";`;\nlet it = new ImportTransformer(sourceCode);\n\nlet outputCode = it.transformToRequire();\n// returns: `const {html, css, LitElement} = require(\"lit\");`\n```\n\n### Has imports?\n\n_Added in v3.0.2_ Returns true if the code has any top level `import`.\n\n```js\nlet sourceCode = `import {html, css, LitElement} from \"lit\";`;\nlet it = new ImportTransformer(sourceCode);\nit.hasImports(); // true\n```\n\n```js\nlet sourceCode = `const {html, css, LitElement} = require(\"lit\");`;\nlet it = new ImportTransformer(sourceCode);\nit.hasImports(); // false\n```\n\n\n## Installation\n\nAvailable on [npm](https://www.npmjs.com/package/esm-import-transformer)\n\n```\nnpm install esm-import-transformer\n```\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fzachleat%2Fesm-import-transformer","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fzachleat%2Fesm-import-transformer","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fzachleat%2Fesm-import-transformer/lists"}