Tampermonkey script to copy selected emails from a Wordpress list to the clipboard

Wordpress.Copy.Selected.Emails.From.List.user.js

// ==UserScript==
// @name         Copy Emails
// @namespace    Wordpress Tools
// @version      1.5
// @description  Copy selected emails to any table containing an email (ScreenShot : https://i.imgur.com/Qe76ZmG.png)
// @author       Leonardo Ciaccio
// @match        */wp-admin/*
// @icon         https://www.google.com/s2/favicons?domain=wordpress.org
// @grant        none
// ==/UserScript==



(function($) {
    'use strict';

    //--> Checking if I loaded jquery properly
    if( $ === 'undefined' ){

        alert("This Tampermonkey script require jQuery");
        return;

    }

    // --> Filter only good table with tbody
    var $good_tables = $( '#wpbody-content' ).find( "td:contains('@')" ).closest( 'tbody' ).closest( 'table' );
    $good_tables = $good_tables.find( 'input[type="checkbox"]' ).closest( 'table' );

    //--> If there is no place to insert the button I will exit
    if( $good_tables.length < 1 )return;

    //--> I insert the button, first position
    $good_tables.before( '<div style="padding:30px!important;"><input type="button" class="button copy-selected-email-next-table" value="Copy Selected Emails"></div>' );

    //--> Copy all selected emails
    $('.button.copy-selected-email-next-table').click( function(evt){

        $(evt.target).val('Loading...');

        var all_email = '';

        $(evt.target).parent().next( "table" ).find('tr').each(function( index, tr ) {

            if( $( tr ).find('th').first().find( 'input[type="checkbox"]' ).first().is(':checked') || $( tr ).find('td').first().find( 'input[type="checkbox"]' ).first().is(':checked') ){

                if( $( tr ).find( "td:contains('@')" ).length > 0 ){

                    var testEmail = $( tr ).find( "td:contains('@')" ).first().text().match(/([a-zA-Z0-9._-]+@[a-zA-Z0-9._-]+\.[a-zA-Z0-9_-]+)/gi);

                    if( testEmail != null )all_email+= (all_email.length < 1) ? testEmail.join(',') : ',' + testEmail.join(',');

                }

            }

        });

        // --> Copy to clipboard
        var dummy = $('<input>').val(all_email).appendTo('body').select();
        document.execCommand('copy')
        dummy.remove();

        $(evt.target).val('Copyed to clipboard (' + ( (all_email.length < 1) ? 0 : all_email.split(',').length ) + ')' );

        setTimeout( function(){

            $(evt.target).val('Copy Selected Emails');

        }, 1000 );

    } );

})(window.jQuery);