vue项目中阻止ajax请求

var CancelToken = axios.CancelToken;var source = CancelToken.source();axios.get(‘/user/12345‘, { ?cancelToken: source.token}).catch(function(thrown) { ?if (axios.isCancel(thrown)) { ???console.log(‘Request canceled‘, thrown.message); ?} else { ???// handle error ?}});// cancel the request (the message parameter is optional)source.cancel(‘Operation canceled by the user.‘);