Executing axios within a JavaScript function without relying on global variables

Question

Executing axios within a JavaScript function without relying on global variables

I am currently exploring the usage of axios (https://cdnjs.cloudflare.com/ajax/libs/axios/0.17.0/axios.js) in a function to communicate with my backend and retrieve data.

The snippet of code provided is functional.

Instead of relying on a global variable to store the response, I am seeking an alternative method.

However, when attempting to move the variable myresponse into the function itself, I encounter difficulties capturing the output.

Is there a way to achieve this without resorting to using a global variable?

var myresponse = "xxx"

function getTimeData() {

    axios.get('/time')
    .then(function (response) {

    console.log(response.data);
        myresponse = response.data;
    })
    .catch(function (error) {
        myresponse = "error";
    });

    return myresponse;

}

console.log(getTimeData())

In this scenario, a local server running at "/time" returns a timestring.

javascript function axios

Answer 1

Answer №1

Axios allows the use of global variables within its functions, but it's important to note that any values you want to access outside of axios should be set after receiving a response. For example:

var myresponse = "xxx"

function getTimeData() {

    axios.get('/time')
    .then(function (response) {
        myresponse = response.data;
        return myresponse;
    })
    .catch(function (error) {
        myresponse = "error";
        return myresponse;
    });
}

console.log(getTimeData())

Keep in mind that logging 'myresponse' before receiving a response may not display the correct value, as it will only be set once a response is received.

Here's a snippet of Vue code that shows how axios sends requests and receives responses asynchronously:

var HTTP = axios.create({
            baseURL: URL,
        })
methods:{
                getUsers(){
                    return HTTP.get('/users/admin')
                },
                deleteUsers(user){
                    HTTP.post('/users/admin',{
                        id : user._id
                    })
                    .then(()=>{
                        this.getUsers()
                    })
                }                   
            },
            created(){
               this.getUsers().then(res=>{
                   this.users = res.data;
               })
            }

Answer 2

Axios allows the use of global variables within its functions, but it's important to note that any values you want to access outside of axios should be set after receiving a response. For example:

var myresponse = "xxx"

function getTimeData() {

    axios.get('/time')
    .then(function (response) {
        myresponse = response.data;
        return myresponse;
    })
    .catch(function (error) {
        myresponse = "error";
        return myresponse;
    });
}

console.log(getTimeData())

Keep in mind that logging 'myresponse' before receiving a response may not display the correct value, as it will only be set once a response is received.

Here's a snippet of Vue code that shows how axios sends requests and receives responses asynchronously:

var HTTP = axios.create({
            baseURL: URL,
        })
methods:{
                getUsers(){
                    return HTTP.get('/users/admin')
                },
                deleteUsers(user){
                    HTTP.post('/users/admin',{
                        id : user._id
                    })
                    .then(()=>{
                        this.getUsers()
                    })
                }                   
            },
            created(){
               this.getUsers().then(res=>{
                   this.users = res.data;
               })
            }

Answer 3

Answer №2

If you are aiming to log the value at the end, there's no need for a separate variable. Simply include it in your function using async/await:

const fetchTimeData = async () => {
    try {
        const response = await axios.get( "/timer" );
        console.log( response.data );
    } catch ( error ) {
        console.log( error );
    }
};

fetchTimeData();

If you intend to utilize the retrieved value elsewhere, you can directly incorporate it within your function:

const fetchTimeData = async () => {
    try {
        const response = await axios.get( "/timer" );
        return manipulateData( response.data );
    } catch ( error ) {
        return handleErrors( error );
    }
};

fetchTimeData();

Answer 4

If you are aiming to log the value at the end, there's no need for a separate variable. Simply include it in your function using async/await:

const fetchTimeData = async () => {
    try {
        const response = await axios.get( "/timer" );
        console.log( response.data );
    } catch ( error ) {
        console.log( error );
    }
};

fetchTimeData();

If you intend to utilize the retrieved value elsewhere, you can directly incorporate it within your function:

const fetchTimeData = async () => {
    try {
        const response = await axios.get( "/timer" );
        return manipulateData( response.data );
    } catch ( error ) {
        return handleErrors( error );
    }
};

fetchTimeData();

Answer 5

Answer №3

If you find yourself in need of gathering data from the axios library, a simple solution is to encapsulate the return statement.

var result;
function fetchData() {
    return axios.get('/data')
}

fetchData()
.then(function(response) { 
  result = response.data;
  console.log(result);
})
.catch(function(error) {
  console.error(error)
});

Answer 6

If you find yourself in need of gathering data from the axios library, a simple solution is to encapsulate the return statement.

var result;
function fetchData() {
    return axios.get('/data')
}

fetchData()
.then(function(response) { 
  result = response.data;
  console.log(result);
})
.catch(function(error) {
  console.error(error)
});

Executing axios within a JavaScript function without relying on global variables

Answer №1

Answer №2

Answer №3

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