Invoking a constructor must use parentheses

문서 > 코드 분석 > Static Analysis Rules > Invoking a constructor must use parentheses

이 페이지는 아직 한국어로 제공되지 않으며 번역 작업 중입니다. 번역에 관한 질문이나 의견이 있으시면 언제든지 저희에게 연락해 주십시오.

Metadata

ID: typescript-best-practices/new-parens

Language: TypeScript

Severity: Notice

Category: Best Practices

Description

This rule enforces the consistent use of parentheses in new statements. In JavaScript, you can omit parentheses when the constructor has no arguments, but you should always use them for consistency.

Non-Compliant Code Examples

// Default (Always)
var a = new Date;
var a = new Date
var a = new (Date);
var a = new (Date)
var a = (new Date)

// This `()` is `CallExpression`'s. This is a call of the result of `new Date`.
var a = new foo.Bar;
var a = (new Foo).bar;

// Explicit always
var a = new Date;
var a = new foo.Bar;
var a = (new Foo).bar;
var a = new new Foo();

// OPTION never not supported
// Never
// var a = new Date();
// var a = new Date()
// var a = new (Date)();
// var a = new (Date)()
// var a = (new Date())
// var a = (new Date())()
// var a = new foo.Bar();
// var a = (new Foo()).bar;
// var a = new new Foo()

Compliant Code Examples

// Default (Always)
var a = new Date();
var a = new Date(function() {});
var a = new (Date)();
var a = new ((Date))();
var a = (new Date());
var a = new foo.Bar();
var a = (new Foo()).bar;

// Explicit Always
var a = new Date();
var a = new foo.Bar();
var a = (new Foo()).bar;

// OPTION never not supported
// Never
// var a = new Date;
// var a = new Date(function() {});
// var a = new (Date);
// var a = new ((Date));
// var a = (new Date);
// var a = new foo.Bar;
// var a = (new Foo).bar;
// var a = new Person('Name')
// var a = new Person('Name', 12)
// var a = new ((Person))('Name');