js 向数组对象中添加属性和属性值

let resultList = [{"name":"a1"},{"name":"b1"}]
resultList.forEach(tem => {
    tem.age = 1;
})

循环向数组resultlist中添加age属性

let resultList = [{"name":"a1","shapes":[{"age":12,"sex":"female"}]},{"name":"b1","shapes":[{"age":10,"sex":"male"}]}]
resultList.forEach(item => {
    item.shapes.forEach(tem => {
        tem.class = "1";
    })
})

向数组中的子属性添加属性

var jsonStr = JSON.stringify(resultList);//将JSON对象转化为JSON字符

或者var jsonStr=resultList.toJSONString(); //将JSON对象转化为JSON字符(需要json包的支持，提示错误可以检查json包版本是否有点低)

参考：https://www.cnblogs.com/haciont/p/6249649.html

           https://blog.csdn.net/weixin_41472431/article/details/95770245