Can vue do synchronization?

Vue can do synchronization. The method for Vue to achieve synchronization: 1. Create a vue sample file; 2. Through "data(){return { userInfo: {id: '',username: '',password:'',avatar: '',},}}methods:{getUserInfo: function () {let _this = this;this.axios({...} )" to achieve synchronization.

##The operating environment of this tutorial ：Windows10 system, Vue version 3, DELL G3 computer

Can vue be synchronized?

Implementation of synchronization method in Vue

Scenario: When implementing the login function, a request is sent to the background through the user name of the form. The front-end thinks that the processing is completed and continues execution, but before the background data is returned, the user obtained by the front-end The data is empty.

Implementation: Wait for the request method to return data before continuing to execute, and implement the synchronization method

Original code

data() {
          	return {

                userInfo: {
                    id: '',
                    username: '',
                    password: '',
                    avatar: '',
                },
            }}methods:{
	getUserInfo: function () {
    	let _this = this;
    	this.axios({
        	url: "http://localhost:8088/verifyLogin",
        	headers: {
            	'Content-Type': 'application/json;charset=utf-8'
        	},
        	method: "post",
        	params: {
            	'userName': _this.form.username        	}
    	}).then(function (resp) {
        	_this.userInfo = resp.data;
        	console.log('11111111');
    	})
	},
    
    
    onSubmit(formName) {
        let _this = this;
        this.getUserInfo();
		// 为表单绑定验证功能
        this.$refs[formName].validate((valid) => {
            if (valid) {
                console.log("22222222");  
                console.log(_this.userInfo);
            } else {
            }
        });
   }}

Console Print

Found the problem: 1 is output on side 2, and is still empty after assigning value from data

Solution Method: Use async/await to achieve synchronization

data() {
          	return {

                userInfo: {
                    id: '',
                    username: '',
                    password: '',
                    avatar: '',
                },
            }}methods:{
	async getUserInfo(params) {
    	let _this = this;
    	let isSuccess = false;
    	await this.axios({
        	url: "http://localhost:8088/verifyLogin",
        	headers: {
            	'Content-Type': 'application/json;charset=utf-8'
        	},
        	method: "post",
        	params: {
            	'userName': _this.form.username        	}
    	}).then(function (resp) {
        	_this.userInfo = resp.data;
            console.log("11111111");
        	isSuccess = true;
    	});
    	return isSuccess;
	},

    onSubmit(formName) {
        let _this = this;
        this.getUserInfo(_this.form.username).then(function (result) {
            if (result) {
                // do sth.
                 // 为表单绑定验证功能
                _this.$refs[formName].validate((valid) => {
                    if (valid) {
                            console.log("22222222");  
                			console.log(_this.userInfo);
                        }
                    } else {
                    }
                });
            } else {
                // do other sth.
            }
        })
       
    }}

Changed results

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