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Writing a custom URL shortener function in JavaScript
Problem
We are required to write two JavaScript functions −
- First function should take in a long url and return a short url that corresponds to it.
- The second function should take in the short url and redirect to the original url.
Example
Following is the code −
const url = 'https://www.google.com/search?client=firefox-b-d&q=google+search';
const obj = {};
const urlShortener = (longURL = '') => {
let shortURL = "short.ly/" + longURL.replace(/[^a-z]/g,'').slice(-4);
if(!obj[shortURL]){
obj[shortURL] = longURL;
};
return shortURL;
}
const urlRedirector = (shortURL = '') => {
return obj[shortURL];
};
const short = urlShortener(url);
const original = urlRedirector(short);
console.log(short);
console.log(original);Output
Following is the console output −
short.ly/arch https://www.google.com/search?client=firefox-b-d&q=google+search
Updated on: 20-Apr-2021
2K+ Views
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