includes()

문자열 객체

includes()에 대해 알아보는 시간을 가지도록 하겠습니다.

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includes()

includes() 메서드는 문자열 포함 여부를 검색하여, 불린(true, false)을 반환합니다.
"문자열".includes(검색값);
"문자열".includes(검색값,시작값);

{
    //11
        {
            const str1 = "javascript reference";
            const currentStr1 = str1.includes("javascript");        //true
            const currentStr2 = str1.includes("j");                 //true
            const currentStr3 = str1.includes("b");                 //false
            const currentStr4 = str1.includes("reference");         //true
            const currentStr5 = str1.includes("reference", 1);      //true
            const currentStr6 = str1.includes("reference", 11);     //true
            const currentStr7 = str1.includes("reference", 12);     //false

        }
}