snapdrop/app/elements/invitation-link/invitation-link-behavior.html

<script>
'use strict';
window.Chat = window.Chat || {};
Chat.InvitationLinkBehavior = {
    properties: {
        contact: {
            type: String
        }
    },
    _copy: function(e) {
        if (e) {
            e.preventDefault();
            e.stopPropagation();
        }
        Polymer.Base.create('textarea');
        var copyTextarea = this.textarea;
        copyTextarea.value = this.link;
        copyTextarea.select();
        try {
            var successful = document.execCommand('copy');
            if (successful) {
                app.displayToast('Copied invitation link to clipboard. Share it to send files to friends!');
            }
        } catch (err) {
            console.log('Oops, unable to copy', err);
        }
        copyTextarea.blur();
    },
    get link() {
        return 'http://' + window.location.host + '/' + this.contact;
    },
    get textarea() {
        var textarea = document.querySelector('#copytextarea');
        if (!textarea) {
            textarea = Polymer.Base.create('textarea');
            textarea.id = 'copytextarea';
            var style = textarea.style;
            style.position = 'absolute';
            style.top = '-10000px';
            document.body.appendChild(textarea);
        }
        return textarea;
    }
};
</script>