I am trying to import the package p-limit into my typescript project. When trying to run the project using tsc && node serve.js
, I run into the error below.
Im stuck at this for a few hours now...
Error [ERR_REQUIRE_ESM]: Must use import to load ES Module: /project/node_modules/p-limit/index.js
require() of ES modules is not supported.
require() of /project/node_modules/p-limit/index.js from /project/dist/services/file.ts is an ES module file as it is a .js file whose nearest parent package.json contains "type": "module" which defines all .js files in that package scope as ES modules.
Instead rename index.js to end in .cjs, change the requiring code to use import(), or remove "type": "module" from /project/node_modules/p-limit/package.json.
This piece of code in file.ts
is causing the issue:
import pLimit from 'p-limit';
const limit = pLimit(1);
tsconfig.json
{
"compilerOptions": {
"target": "ES2017",
"module": "commonjs",
"resolveJsonModule": true,
"esModuleInterop": true,
"rootDir": "src",
"outDir": "dist",
"sourceMap": true,
"experimentalDecorators": true,
"types": [
"node",
"express"
],
"strictNullChecks": true
},
"files": [
"./node_modules/@types/node/index.d.ts",
"./node_modules/p-limit/index.d.ts"
],
"include": [
"src/**/*.ts"
],
"exclude": [
"node_modules"
]
}
Node version: v14.18.0
CodePudding user response:
add
"lib": [
"es2017"
]
to your tsconfig.json
CodePudding user response:
p-limit 4.0.0 and above are now ESM only. You can downgrade p-limit to 3.1.0 which is commonjs and it should work fine.
This package is now pure ESM. Please read this.
https://github.com/sindresorhus/p-limit/releases/tag/v4.0.0
Alternatively you can switch your project from CJS to ESM, but that's a larger issue.