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Detect the Content material Kind within the Clipboard


A consumer’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’ll be able to retrieve the contents of the consumer’s clipboard utilizing the navigator.clipboard API. This API requires consumer permission because the clipboard might comprise delicate information. 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 obtainable
}

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 recognize the contents and the MIME kind, 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 kind and content material obtainable, you need to use <img> with an information URI for show. Understanding the contents of a consumer’s clipboard might be useful when presenting precisely what they’ve copied!

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