RetryRequest.ts

export class RetryRequest {
    private maxRetries: number[];

    constructor(private timeout: number, maxRetries = 10) {
        this.maxRetries = [...Array(maxRetries)].map((_, i) => i)
    }

    wait(timeout: number) {
        return new Promise((resolve) => setTimeout(() => resolve(), timeout))
    }

    async requestWithRetry(url: string) {
        for (const i of this.maxRetries) {
            try {
                const response = await fetch(url)
                return response.json()
            } catch (err) {
                console.log('Waiting', this.timeout, 'ms')
                await this.wait(this.timeout)
                console.log('Retrying', err.message, i)
            }
        }
    }
}

const url = 'https://jsonplaceholder.typicode.com/posts/1';
new RetryRequest(2000).requestWithRetry(url);