A person’s clipboard is a “catch all” between the working system and the apps employed on it. Once you use an online browser, you’ll be able to spotlight textual content or right-click a picture and choose “Copy Picture”. That made me take into consideration how builders can detect what’s within the clipboard.

You possibly can retrieve the contents of the person’s clipboard utilizing the navigator.clipboard API. This API requires person permission because the clipboard might include delicate information. You possibly can make use of the next JavaScript to get permission to make use of the clipboard API:

const outcome = await navigator.permissions.question({identify: "clipboard-write"});
if (outcome.state === "granted" || outcome.state === "immediate") {
  // Clipboard permissions accessible
}

With clipboard permissions granted, you question the clipboard to get a ClipboardItem occasion with particulars of what is been copied:

const [item] = await navigator.clipboard.learn();

// When textual content is copied to clipboard....
merchandise.sorts // ["text/plain"]

// When a picture is copied from a web site...
merchandise.sorts // ["text/html", "image/png"]

As soon as you realize the contents and the MIME sort, you will get the textual content in clipboard with readText():

const content material = await navigator.clipboard.readText();

Within the case of a picture, when you have the MIME sort and content material accessible, you should use <img> with a knowledge URI for show. Realizing the contents of a person’s clipboard could be useful when presenting precisely what they’ve copied!