axios提交
axios.post('/cancellation_msg_getnum',
{msg:msg},
{headers:{"Content-Type":'application/x-www-form-urlencoded;charset=UTF-8'}}
).then(function(res){
console.log(res.data.res)
that.res = res.data.res
}).catch(function(err){
console.log(err)
})
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