The following function forces all cut or copied text to be uppercase. This is supported in most browsers and handler functions can intercept the events to make changes using a clipboardData object passed as a parameter. The cut, copy, and paste events fire whenever the user initiates a clipboard action in the browser - typically with right-click menus or the keyboard shortcuts mentioned above. Try copying image data from a graphics application, then use the paste button. This works in a similar way to the text demonstration, in that copy and paste buttons must point to DOM elements using a CSS selector in data-copyblob and data-pasteblob attributes. Refer to clipboardblob.js for the JavaScript. View the Clipboard API image demonstration (supported in Chromium-based browsers). This is passed to a ClipboardItem constructor so it can be written to the clipboard: constīlob = await image. These have less browser support but are able to copy and paste any type of data such as binary images.Ĭopying requires blob data typically returned by a fetch() or canvas.toBlob() method. The Clipboard API’s readText() and writeText() are convenience options for the more generic read() and write() methods. The text paste button is very similar except it defines a data-paste attribute which must point to a DOM node: paste When clicked, the JavaScript event handler locates the text, copies it to the clipboard, and shows an animated success message. The button is only shown when () is supported. Optionally, you can set a custom success message in a data-done attribute: The text content of the first matching element is then copied. a CSS selector - such as data-copy="#mysection". a hard-coded string - such as data-copy="copy this to the clipboard".You can set this value to either of these: This example implements text copying when a data-copy attribute is added any HTML element such as a button. Refer to clipboardtext.js for the JavaScript. View the Clipboard API text demonstration You’ll require considerably more code to detect support and handle errors … writeText ( 'This text is now in the clipboard' ) // get text FROM the clipboard let text = await navigator. The API is refreshingly simple: // copy text TO the clipboard await navigator. It’s also possible to examine and request the status using the Permissions API.Ĭopying and pasting text will be a useful option in most applications. It shouldn’t cause any issues, given that the API is asynchronous and returns a Promise. This alert is shown when a page first requests clipboard access. When necessary, the user will be prompted for permission to read clipboard data: The API is only available to the active browser tab (not background tabs) and can only be triggered by a user interaction such as a click. When running in an iframe, the parent page must also grant clipboard-read and/or clipboard-write permissions: To avoid potential issues, the Clipboard API can only be used on pages served over HTTPS ( localhost is also permitted). A nefarious page could replace copied text with a dangerous command or even an executable file.
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