document.execCommand('copy');
listenCopy() {
document.addEventListener("copy", e => {
let clipboardData = window.clipboardData; //for IE
if (!clipboardData) { // for chrome
clipboardData = e.clipboardData;
}
clipboardData.setData('text', this.props.expandLink);
// clipboardData.clear();
e.preventDefault(); // default behaviour is to copy any selected text
})
// when leave page
unregisterCopy () {
document.addEventListener('copy', null)
}