eslint-plugin-svelte/lib/rules/no-store-async.js

ESLint plugin for Svelte using AST

import { createRule } from '../utils/index.js';
import { extractStoreReferences } from './reference-helpers/svelte-store.js';
export default createRule('no-store-async', {
    meta: {
        docs: {
            description: 'disallow using async/await inside svelte stores because it causes issues with the auto-unsubscribing features',
            category: 'Possible Errors',
            recommended: true,
            default: 'error'
        },
        schema: [],
        messages: {
            unexpected: 'Do not pass async functions to svelte stores.'
        },
        type: 'problem'
    },
    create(context) {
        return {
            Program() {
                for (const { node } of extractStoreReferences(context)) {
                    const [, fn] = node.arguments;
                    if (!fn ||
                        (fn.type !== 'ArrowFunctionExpression' && fn.type !== 'FunctionExpression') ||
                        !fn.async) {
                        continue;
                    }
                    const start = fn.loc.start;
                    context.report({
                        node: fn,
                        loc: {
                            start,
                            end: {
                                line: start.line,
                                column: start.column + 5
                            }
                        },
                        messageId: 'unexpected'
                    });
                }
            }
        };
    }
});