如何獲取到微信公衆裏面的code

mounted () {

this . openId = lscache . get ( 'openId' )

this . WxOpenIdInput . code = this . getQueryString ( 'code' )

if ( ! this . WxOpenIdInput . code ) {

// // 0註冊微信連接地址

const authUrl = this . isValidauthUrl ( 0 )

window . location . href = authUrl

} else {

this . WeiXinClient . getOpenIdByCode ( this . WxOpenIdInput )

. then ( res => {

console . log ( res )

lscache . set ( 'openId' , res . openId )

lscache . set ( 'nickname' , res . nickname )

})

. catch ( res => {})

}

}

getQueryString ( name ) {

var reg = new RegExp ( '(^|&)' + name + '=([^&]*)(&|$)' , 'i' )

var r = window . location . search . substr ( 1 ). match ( reg )

if ( r != null ) {

return unescape ( r [ 2 ])

}

return null

}