Axios request queue-like that limits number of requests at any given time

axios.js

import axios from 'axios'

const MAX_REQUESTS_COUNT = 5
const INTERVAL_MS = 10
let PENDING_REQUESTS = 0

// create new axios instance
const api = axios.create({})

/**
 * Axios Request Interceptor
 */
api.interceptors.request.use(function (config) {
	return new Promise((resolve, reject) => {
		let interval = setInterval(() => {
			if (PENDING_REQUESTS < MAX_REQUESTS_COUNT) {
				PENDING_REQUESTS++
				clearInterval(interval)
				resolve(config)
			} 
		}, INTERVAL_MS)
	})
})

/**
 * Axios Response Interceptor
 */
api.interceptors.response.use(function (response) {
	PENDING_REQUESTS = Math.max(0, PENDING_REQUESTS - 1)
	return Promise.resolve(response)
}, function (error) {
	PENDING_REQUESTS = Math.max(0, PENDING_REQUESTS - 1)
	return Promise.reject(error)
})

export default api

instead of importing axios, you can just import this file like so:

import axiosWithDelimiterFile from 'path-to-this-file`

// then use it like a normal axios object
axiosWithDelimiterFile.get(url).then()

Could you explain again how should I import it to laravel project?
In bootstrap.js I have:

window.axios = require('axios');
window.axios.defaults.headers.common['X-Requested-With'] = 'XMLHttpRequest';

This is exactly what I was looking for! I was getting too many socket errors with a node app that writes data from a read stream to a remote API with POST calls. Thanks for putting this out there! This helped me rate limit my app so I don't overwhelm the remote API.

Hi , Tried using this axios interceptor for the request only. Limited the MAX_REQUESTS_COUNT=1 and INTERVAL_MS=1000.
I was using it for the axios 429 "too many concurrent request " error. The server takes only 1 request per second.Even the logs are getting generated only 1 time but some how i am getting this error . Can you help.

Thanks.

You are a genius

Thank you so much for this!