index.js

// taken from here
// https://github.com/import-js/eslint-plugin-import/blob/main/src/rules/no-default-export.js
export const plugin = {
	meta: {
		type: "suggestion",
		docs: {
			category: "Style guide",
			description: "Forbid default exports.",
		},
		schema: [],
	},
	rules: {
		"no-default-export": {
			create(context) {
				// ignore non-modules
				if (context.parserOptions.sourceType !== "module") {
					return {};
				}

				const preferNamed = "Prefer named exports.";
				const noAliasDefault = ({ local }) =>
					`Do not alias \`${local.name}\` as \`default\`. Just export \`${local.name}\` itself instead.`;

				return {
					ExportDefaultDeclaration(node) {
						const { loc } =
							context.getSourceCode().getFirstTokens(node)[1] || {};
						context.report({ node, message: preferNamed, loc });
					},

					ExportNamedDeclaration(node) {
						node.specifiers
							.filter(
								(specifier) =>
									(specifier.exported.name || specifier.exported.value) ===
									"default",
							)
							.forEach((specifier) => {
								const { loc } =
									context.getSourceCode().getFirstTokens(node)[1] || {};
								if (specifier.type === "ExportDefaultSpecifier") {
									context.report({ node, message: preferNamed, loc });
								} else if (specifier.type === "ExportSpecifier") {
									context.report({
										node,
										message: noAliasDefault(specifier),
										loc,
									});
								}
							});
					},
				};
			},
		},
	},
};