declare global {
	interface Window {
		clipboardData?: {
			setData?: (dataType: 'Text', data: string) => boolean
		}
	}
}

/**
 * Copy to clipboard.
 *
 * @see http://stackoverflow.com/questions/400212/how-do-i-copy-to-the-clipboard-in-javascript
 */
export function copy(text: string): boolean {

	/** @see https://caniuse.com/?search=navigator.clipboard.writeText */
	// @ts-ignore
	if(window?.navigator?.clipboard?.writeText) {
		navigator.clipboard.writeText(text)
		return true
	}

	if(window?.clipboardData?.setData) {

		/** IE specific code path to prevent textarea being shown while dialog is visible. */
		return window.clipboardData.setData('Text', text)

	} else if(document.queryCommandSupported && document.queryCommandSupported('copy')) {

		const textarea = document.createElement('textarea')
		textarea.textContent = text
		textarea.style.position = 'fixed' // Prevent scrolling to bottom of page in MS Edge.
		document.body.appendChild(textarea)
		textarea.select()

		try {
			return document.execCommand('copy') // Security exception may be thrown by some browsers.
		} catch(ex) {
			return false
		} finally {
			document.body.removeChild(textarea)
		}
	}

	return false
}