import.meta

20201

import.meta JavaScript URL

import.meta

import.meta null

url: URL ? # URL URL Node.js file://
resolve: URL

import.meta import meta import

import.meta JavaScript eval() import.meta

import window.location Node.js process.env HTML

html

<script type="module">
  import "./index.mjs?someURLInfo=5";
</script>

index.mjs import.meta someURLInfo

// index.mjs
new URL(import.meta.url).searchParams.get("someURLInfo"); // 5

// index.mjs
import "./index2.mjs?someURLInfo=5";

// index2.mjs
new URL(import.meta.url).searchParams.get("someURLInfo"); // 5

Node.js ES node index.mjs?someURLInfo=5 CommonJS URL precess.argv node index.mjs --someURLInfo=5

Node.js CommonJS __dirname ES import.meta import.meta.url URL

CommonJS

const fs = require("fs/promises");
const path = require("path");

const filePath = path.join(__dirname, "someFile.txt");
fs.readFile(filePath, "utf8").then(console.log);

import fs from "node:fs/promises";

const fileURL = new URL("./someFile.txt", import.meta.url);
fs.readFile(fileURL, "utf8").then(console.log);


ECMAScript 2027 LanguageSpecification # prod-ImportMeta

MDN

2025716 MDN

GitHub