javascript - 如何修改JSON数组？

Question

如何更新以下多维 JSON 数组中特定索引处的值？

我想更新放置在 footer_logo 节点内的 background-image 的值。

{
    "Machine1": {
        "sidebar_inner": {
            "img": "img/pill.png",
            "background-color": "#ffffff",
            "side_logo": {
                "background-image": "../footer_logo.png"
            }
        },
        "lb_footer": {
            "img": "img/bin.png",
            "footer_logo": {
                "background-image": "..img/footer_logo.png"
            }
        },
        "machine_stand": {
            "img": "img/machine_stand.png"
        },
        "side": {
            "backgroundcolor": "#ccc"
        }
    }
}

Answer 1

我添加了一个 jsfiddle 示例 here .这很简单，请看下面的代码。

var myJson = {
        "Machine1": {
            "sidebar_inner": {
                "img": "img/pill.png",
                "background-color": "#ffffff",
                "side_logo": {
                    "background-image": "../footer_logo.png"
                }
            },
            "lb_footer": {
                "img": "img/bin.png",
                "footer_logo": {
                    "background-image": "..img/footer_logo.png"
                }
            },
            "machine_stand": {
                "img": "img/machine_stand.png"
            },
            "side": {
                "backgroundcolor": "#ccc"
            }
        }
    };

    myJson.Machine1.lb_footer.footer_logo['background-image'] = 'New value.';

    alert(myJson.Machine1.lb_footer.footer_logo['background-image']);