请问大神们：immutable如何更新，获取 数组和对象嵌套的数据呢？

Question

Immutable.fromJS({
    products:[
        {
            id:"11",
            name:"phone",
        },
        {
            id:"12",
            name:"book",
        },
        {
            id:"13",
            name:"T-shirt",
            size:["S","M","L","XL"],
        }
    ],
    cart:{
        id:"4",
        name:"seaseeyoul",
    },
    arr:[1,2,3,4,5,6]
})

现在通过immutable怎么获取 size[0] 即获取 size为S的这个值呢？ 怎么往size里面添加一个 “XXL” 以及 把“M” 更新为null呢

Answer 1

参考文档:https://facebook.github.io/im...

demo

const foo = Immutable.fromJS({
    products:[
        {
            id:"11",
            name:"phone",
        },
        {
            id:"12",
            name:"book",
        },
        {
            id:"13",
            name:"T-shirt",
            size:["S","M","L","XL"],
        }
    ],
    cart:{
        id:"4",
        name:"seaseeyoul",
    },
    arr:[1,2,3,4,5,6]
});

const newFoo = foo.setIn(['products', 2, 'size', 1], null)

console.log(newFoo.toJS())