eslint-plugin-esm/dist/rules/top-side-effect-imports.js

ESLint plugin for linting ESM (import/export syntax)

import { createRule, DEFAULT_MESSAGE_ID, getRuleName } from "../common.js";
export const topSideEffectImports = createRule({
    name: getRuleName(import.meta.url),
    message: "Side effect imports must be placed before other import statements.",
    create: (context) => {
        let hasNonSideEffectImport = false;
        return {
            ImportDeclaration: (node) => {
                if (node.specifiers.length > 0) {
                    hasNonSideEffectImport = true;
                    return;
                }
                if (hasNonSideEffectImport) {
                    context.report({ node, messageId: DEFAULT_MESSAGE_ID });
                }
            },
        };
    },
});
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