메서드 (trim / trimStart / trimEnd)

trim() / trimStart() / trimEnd()

앞 뒤 공백을 제거한다.

번호	기본값	메서드	리턴값
1	javascript	trim	javascript
2	str2	trimStart	javascript
3	str3	trimEnd	javascript

    const str1 = "       javascript      "
    const currentStr1 = str1.trim();

    document.querySelector(".sample03_N1").innerHTML = "1";
    document.querySelector(".sample03_Q1").innerHTML = "javascript";
    document.querySelector(".sample03_M1").innerHTML = "trim";
    document.querySelector(".sample03_P1").innerHTML = currentStr1;
    
    const str2 = "       javascript      "
    const currentStr2 = str2.trimStart();

    document.querySelector(".sample03_N2").innerHTML = "2";
    document.querySelector(".sample03_Q2").innerHTML = "str2";
    document.querySelector(".sample03_M2").innerHTML = "trimStart";
    document.querySelector(".sample03_P2").innerHTML = currentStr2;

    const str3 = "       javascript      "
    const currentStr3 = str3.trimEnd();

    document.querySelector(".sample03_N3").innerHTML = "3";
    document.querySelector(".sample03_Q3").innerHTML = "str3";
    document.querySelector(".sample03_M3").innerHTML = "trimEnd";
    document.querySelector(".sample03_P3").innerHTML = currentStr3;