let cookieInstance = win.webContents.session.cookies;

cookieInstance.on('changed', (e, cookie, cause, removed) => {

    let obj = { e, cookie, cause, removed }

    console.log(obj);

});

cookieInstance.get({ domain: 'dayu.com' }, (error, cookies) => {

    let tarCookie = cookies.find(v => v.name == "USER_TMP")

});

代码如上↑