객체불러오기(펼침연산자사용>복사,추가,결합)
{ //객체불러오기(펼침연산자,복사) const ob18 = { a: 100, b: 200, c: "javascript" } const spread = { ...ob18 }; document.write(spread.a, " "); document.write(spread.b, " "); document.write(spread.c, " "); document.write( " "); } { //객체불러오기(펼침연산자,추가) const ob19 = { a: 100, b: 200, c: "javascript" }; const spread = { ...ob19, d: "react" }; document.write(spread.a, " "); document.write(spread.b, " "); document.w..
객체구조분해할당
//객체구조분해할당1 { const ob1 ={ a:100, b:200, c:300 } const{a,b,c} = ob1; document.write(a+b ," ");//300 } //객체구조분해할당2(새 변수 할당) { const ob2 ={ a:100, b:200, c:300 } const{ a:name1, b:name2, c:name3 } = ob2; document.write(name1+name3," "); //400 } //선언없는 객체구조분해할당 { const { a=100, b=200, c=300 } = {b:500,c:600} document.write(b+c);//1100 }
