添加save接口
将下述代码复制到Console窗口 并Enter运行

(function(console){
 
    console.save = function(data, filename){
 
        if(!data) {
            console.error('Console.save: No data')
            return;
        }
 
        if(!filename) filename = 'console.json'
 
        if(typeof data === "object"){
            data = JSON.stringify(data, undefined, 4)
        }
 
        var blob = new Blob([data], {type: 'text/json'}),
            e    = document.createEvent('MouseEvents'),
            a    = document.createElement('a')
 
        a.download = filename
        a.href = window.URL.createObjectURL(blob)
        a.dataset.downloadurl =  ['text/json', a.download, a.href].join(':')
        e.initMouseEvent('click', true, false, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null)
        a.dispatchEvent(e)
    }
})(console)

控制台中运行执行以下函数,然后会弹出保存窗口

console.save(window.jsonObj, "my.json");

第1个参数为要保存的json对象