Copy String to Clipboard ES6 Method

copy-to-clipboard-es6.js

        copyToClipboard(str) {
            /* ——— Derived from: https://hackernoon.com/copying-text-to-clipboard-with-javascript-df4d4988697f
                   improved to add iOS device compatibility——— */
            const el = document.createElement('textarea'); // Create a <textarea> element

            let storeContentEditable = el.contentEditable;
            let storeReadOnly = el.readOnly;

            el.value = str; // Set its value to the string that you want copied
            el.contentEditable = true;
            el.readOnly = false;
            el.setAttribute('readonly', false); // Make it readonly false for iOS compatability
            el.setAttribute('contenteditable', true); // Make it editable for iOS
            el.style.position = 'absolute';
            el.style.left = '-9999px'; // Move outside the screen to make it invisible
            document.body.appendChild(el); // Append the <textarea> element to the HTML document
            const selected =
                document.getSelection().rangeCount > 0 // Check if there is any content selected previously
                    ? document.getSelection().getRangeAt(0) // Store selection if found
                    : false; // Mark as false to know no selection existed before
            el.select(); // Select the <textarea> content
            el.setSelectionRange(0, 999999);
            document.execCommand('copy'); // Copy - only works as a result of a user action (e.g. click events)
            document.body.removeChild(el); // Remove the <textarea> element
            if (selected) {
                // If a selection existed before copying
                document.getSelection().removeAllRanges(); // Unselect everything on the HTML document
                document.getSelection().addRange(selected); // Restore the original selection
            }

            el.contentEditable = storeContentEditable;
            el.readOnly = storeReadOnly;
        }

Works on iOS >=10 too. See
https://stackoverflow.com/questions/34045777/copy-to-clipboard-using-javascript-in-ios