/** * @fileoverview Rule to check use of chained assignment expressions * @author Stewart Rand */ "use strict"; //------------------------------------------------------------------------------ // Rule Definition //------------------------------------------------------------------------------ /** @type {import('../types').Rule.RuleModule} */ module.exports = { meta: { type: "suggestion", defaultOptions: [ { ignoreNonDeclaration: false, }, ], docs: { description: "Disallow use of chained assignment expressions", recommended: false, url: "https://eslint.org/docs/latest/rules/no-multi-assign", }, schema: [ { type: "object", properties: { ignoreNonDeclaration: { type: "boolean", }, }, additionalProperties: false, }, ], messages: { unexpectedChain: "Unexpected chained assignment.", }, }, create(context) { const [{ ignoreNonDeclaration }] = context.options; const selectors = [ "VariableDeclarator > AssignmentExpression.init", "PropertyDefinition > AssignmentExpression.value", ]; if (!ignoreNonDeclaration) { selectors.push("AssignmentExpression > AssignmentExpression.right"); } return { [selectors](node) { context.report({ node, messageId: "unexpectedChain", }); }, }; }, };