aaaaaaaa.bbbbbbbb.cccccccc.dddddddd.eeeeeeee.ffffffff.gggggggg2 = class extends ( aaaaaaaa.bbbbbbbb.cccccccc.dddddddd.eeeeeeee.ffffffff.gggggggg1 ) { method() { console.log("foo"); } }; foo = class extends bar { method() { console.log("foo"); } }; aaaaaaaa.bbbbbbbb.cccccccc.dddddddd.eeeeeeee.ffffffff.gggggggg2 = class extends ( bar ) { method() { console.log("foo"); } }; foo = class extends ( aaaaaaaa.bbbbbbbb.cccccccc.dddddddd.eeeeeeee.ffffffff.gggggggg2 ) { method() { console.log("foo"); } }; module.exports = class A extends B { method() { console.log("foo"); } };