Ajax in javascript using countries rest api

ajax (asynchronous javascript and xml) is a technique that allows web applications to communicate with servers and update parts of a web page without reloading the entire page. when using a rest api, such as a countries api, ajax can be employed to fetch data about various countries, like their names, populations, or geographical information.

in a typical scenario, a user might select a country from a dropdown menu, triggering an ajax request to the countries api. the response, usually in json format, contains the relevant data, which can then be parsed and dynamically displayed on the webpage. this enhances user experience by providing real-time data updates, making applications more interactive and responsive.

ajax simplifies the process of retrieving and displaying data while minimizing server load and improving performance, making it a vital tool for modern web development.
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