stringpadding:letstr="abc";leta=str.padEnd(5);letb=str.padStart(5);letc=str.padEnd(5,"a");letd=str.padStart(5,"a");console.log("|"+str+"|");//显示|abc|console.log("|"+a+"|");//显示|abc|console.log("|"+b+"|");//显示|abc|console.log("|"+c+"|");//显示|abcaa|console.log("|"+d+"|");//显示|aaabc|对象:letobj={name:"曹薇",age:23};letarr=["a","b"];console.log(Object.values(obj));//显示["曹魏",23]console.log(Object.values(arr));//显示["a","b"]console.log(Object.entries(obj));//显示[Array(2),Array(2)]函数对象的定义。调用时参数可以加尾部逗号：functionfn(a,b){console.log(123);}fn(1,2,);
