Detect the Content material Kind within the Clipboard

A person’s clipboard is a “catch all” between the working system and the apps employed on it. While you use an online browser, you may 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’ll be able to retrieve the contents of the person’s clipboard utilizing the navigator.clipboard API. This API requires person permission because the clipboard might include delicate knowledge. You’ll be able to make use of the next JavaScript to get permission to make use of the clipboard API:

const end result = await navigator.permissions.question({title: "clipboard-write"});
if (end result.state === "granted" || end result.state === "immediate") {
  // Clipboard permissions out there
}

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.varieties // ["text/plain"]

// When a picture is copied from an internet site...
merchandise.varieties // ["text/html", "image/png"]

As soon as the contents and the MIME kind, you may get the textual content in clipboard with readText():

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

Within the case of a picture, in case you have the MIME kind and content material out there, you should utilize <img> with a knowledge URI for show. Figuring out the contents of a person’s clipboard might be useful when presenting precisely what they’ve copied!