librescript/web/stores/system/clipboard.ts

// NOTE: We ONLY run this on the (web) client.
if (process.client) {
    window.Clipboard = (function(window, document, navigator) {
        let textArea,
            copy

        function isOS() {
            return navigator.userAgent.match(/ipad|iphone/i)
        }

        function createTextArea(text) {
            textArea = document.createElement('textArea')
            textArea.value = text
            document.body.appendChild(textArea)
        }

        function selectText() {
            let range,
                selection

            if (isOS()) {
                range = document.createRange()
                range.selectNodeContents(textArea)
                selection = window.getSelection()
                selection.removeAllRanges()
                selection.addRange(range)
                textArea.setSelectionRange(0, 999999)
            } else {
                textArea.select()
            }
        }

        function _copyToClipboard() {
            document.execCommand('copy')
            document.body.removeChild(textArea)
        }

        copy = function(text) {
            createTextArea(text)
            selectText()
            _copyToClipboard()
        }

        return { copy }
    })(window, document, navigator)
}