Web Api Intro

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Web APIs – Intro

What is Web API?

  • API full form is Application Programming Interface.
  • A Web API acts as an application programming interface for the Web/
  • A Browser API can extend the functionality of a web browser.
  • A Server API can extend the functionality of a web server.

Browser APIs

All browsers consist of a set of built-in Web APIs to support complex operations and to help access data.

For example, the Geolocation API can return the coordinates of where the browser is located.

Example

Get the latitude and longitude of the user’s position:

<!DOCTYPE html>

<html>

<body>

<h2>JavaScript Geolocation</h2>

<p>Click the button to get your coordinates.</p>

<button onclick=”getLocation()”>Try It</button>

<p id=”demo”></p>

<script>

const x = document.getElementById(“demo”);

function getLocation() {

  try {

 navigator.geolocation.getCurrentPosition(showPosition);

  } catch {

    x.innerHTML = err;

  }

}

function showPosition(position) {

  x.innerHTML = “Latitude: ” + position.coords.latitude +

  “<br>Longitude: ” + position.coords.longitude;

}

</script>

</body>

</html>

Output

JavaScript Geolocation

Click the button to get your coordinates.

Third-Party APIs

Third-party APIs are not built into your browser.

To use these APIs, you will have to download the code from the Web.

Examples

YouTube API – enables you to display videos on a website

Twitter API – enables you to display Tweets on the website

Facebook API – This allows you to display Facebook info on a website.


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