前后端接口联调时，参数过于复杂时。自己想复现bug的话，就得编写大量的参数，费时费力还搞心态。下面就通过一段js代码，获取.json格式的参数，自己再偷偷摸摸去改bug ^_

(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)

console.save(a, "a.json")