微信小程序：获取openid

openid

//调用微信登录接口  
wx.login({
    success: function (loginCode) {
        var appid = ''; //填写微信小程序appid  
        var secret = ''; //填写微信小程序secret  

        //调用request请求api转换登录凭证  
        wx.request({
            url: 'https://api.weixin.qq.com/sns/jscode2session?appid='+appid+'&secret='+secret+'&grant_type=authorization_code&js_code=' + loginCode.code,
            header: {
                'content-type': 'application/json'
            },
            success: function (res) {
                console.log(res.data.openid) //获取openid  
            }
        })
    }
}) 

https://api.weixin.qq.com

处理办法：

wx.loginloginCode.codeloginCode.code'https://api.weixin.qq.com/sns/jscode2session?appid='+appid+'&secret='+secret+'&grant_type=authorization_code&js_code=' + loginCode.codeopenid