js遍历数组对象拼接换行

可以使用for循环或者forEach遍历数组对象，然后通过字符串拼接的方式加入换行符"\n"即可。例如：

var fruits = [
  {name: "apple", color: "red"},
  {name: "banana", color: "yellow"},
  {name: "grape", color: "purple"}
];

var output = "";
fruits.forEach(function(fruit) {
  output += fruit.name + " - " + fruit.color + "\n";
});

console.log(output);

输出结果如下：

apple - red
banana - yellow
grape - purple