Vue uses created hooks to call methods in methods?

The

code is as follows:
new Vue ({
methods: {

post: function (url, data) {
  $.ajax({
    type: "POST",
    url: "...."+url+".ashx",
    data:data,          
 })
}

},
created () {

this.post("XXX", "XXX").done(function(res){
  console.log(res)
})

}
})
error: this.post (.) Is undefined
doesn"t know enough about vue. Why can"t we call the post method of methods here? because how to write to get the post method, ask for expert advice

Javascript
Mar.31,2021

this.post can be called in created. Is there a problem with your done

vue component life cycle
clipboard.png

attached

there is no return value for post () in your code, that is, undefined, so calling done () reported an error. 

new Vue({
    methods: {
        
        post: function (url, data) {
          return new Promise(function(resolve, reject) {
              $.ajax({
                type: 'POST',
                url: '....'+url+'.ashx',
                data:data,
                success: function(res) {
                    resolve(res);
                }         
             })
          });
        }
    },
    created () {
        this.post('XXX', 'XXX').then(function(res){
          console.log(res)
        });
    }
});

Previous: Python turns strings into dictionaries except for json.loads ()

Next: How to access the website of the root directory of the vue project?

css mysql arrays josn react html typescript webpack npm sass R objective-c .net sql-server jquery python-3.x angularjs django angular excel regex iphone ajax linux xml pandas vba spring database wordpress string wpf xcode windows bash postgresql oracle multithreading eclipse list firebase algorithm macos forms image scala visual-studio azure bootstrap spring-boot react-native python-2.7 docker performance function winforms matlab powershell apache dataframe api sqlite numpy rest shell selenium flutter dart maven loops qt swing android-studio csv express file class tensorflow sorting codeigniter perl
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b3d236-2c384.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b3d236-2c384.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
Need Help?