JS——String坑1

var str = [1,2,3,4,5]; //字符数组，数组
		var str1 = str; //引用赋值
		str1 = str;
		str1.length--;
		console.log(str.length); //4
		console.log(str1.length); //4
		console.log(str); //[1,2,3,4]
		console.log(str1); //[1,2,3,4]