eslint-plugin-import-x/lib/rules/no-mutable-exports.js

Import with sanity.

import { createRule } from '../utils/index.js';
export default createRule({
    name: 'no-mutable-exports',
    meta: {
        type: 'suggestion',
        docs: {
            category: 'Helpful warnings',
            description: 'Forbid the use of mutable exports with `var` or `let`.',
        },
        schema: [],
        messages: {
            noMutable: "Exporting mutable '{{kind}}' binding, use 'const' instead.",
        },
    },
    defaultOptions: [],
    create(context) {
        function checkDeclaration(node) {
            if ('kind' in node && (node.kind === 'var' || node.kind === 'let')) {
                context.report({
                    node,
                    messageId: 'noMutable',
                    data: {
                        kind: node.kind,
                    },
                });
            }
        }
        function checkDeclarationsInScope({ variables }, name) {
            for (const variable of variables) {
                if (variable.name === name) {
                    for (const def of variable.defs) {
                        if (def.type === 'Variable' && def.parent) {
                            checkDeclaration(def.parent);
                        }
                    }
                }
            }
        }
        return {
            ExportDefaultDeclaration(node) {
                const scope = context.sourceCode.getScope(node);
                if ('name' in node.declaration) {
                    checkDeclarationsInScope(scope, node.declaration.name);
                }
            },
            ExportNamedDeclaration(node) {
                const scope = context.sourceCode.getScope(node);
                if (node.declaration) {
                    checkDeclaration(node.declaration);
                }
                else if (!node.source) {
                    for (const specifier of node.specifiers) {
                        checkDeclarationsInScope(scope, specifier.local.name);
                    }
                }
            },
        };
    },
});
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