문자열(Strings)

문자열(Strings)

•  Use single quotes '' for strings.

• 문자열에는 싱크쿼트 '' 를 사용해 주십시오.

  // bad
  const name = "Capt. Janeway";
  
  // good
  const name = 'Capt. Janeway';

• Strings longer than 100 characters should be written across multiple lines using string concatenation.

• 100문자 이상의 문자열은 문자열연결을 사용해서 복수행에 걸쳐 기술할 필요가 있습니다.

• Note: If overused, long strings with concatenation could impact performance. jsPerf & Discussion.

• 주의: 문자연결을 과용하면 성능에 영향을 미칠 수 있습니다. jsPerf & Discussion.

  // bad
  const errorMessage = 'This is a super long error that was thrown because of Batman. When you stop to think about how Batman had anything to do with this, you would get nowhere fast.';
  
  // bad
  const errorMessage = 'This is a super long error that was thrown because \
  of Batman. When you stop to think about how Batman had anything to do \
  with this, you would get nowhere \
  fast.';
  
  // good
  const errorMessage = 'This is a super long error that was thrown because ' +
    'of Batman. When you stop to think about how Batman had anything to do ' +
    'with this, you would get nowhere fast.';

• 6.4 When programmatically building up strings, use template strings instead of concatenation.

• 6.4 프로그램에서 문자열을 생성하는 경우는 문자열 연결이 아닌 template strings를 이용해 주십시오.

  Why? Template strings give you a readable, concise syntax with proper newlines and string interpolation features.

  왜? Template strings 는 문자열 보간기능과 적절한 줄바꿈 기능을 갖는 간결한 구문으로 가독성이 좋기 때문입니다.

  // bad
  function sayHi(name) {
    return 'How are you, ' + name + '?';
  }
  
  // bad
  function sayHi(name) {
    return ['How are you, ', name, '?'].join();
  }
  
  // good
  function sayHi(name) {
    return `How are you, ${name}?`;
  }

• Never use eval() on a string, it opens too many vulnerabilities.

• 절대로 eval() 을 이용하지 마십시오. 이것은 많은 취약점을 만들기 때문입니다.