// ==UserScript==
// @name         ao3 adjust line breaks
// @namespace    https://greasyfork.org/en/users/36620
// @version      1.0
// @description  insert or delete line breaks
// @author       scriptfairy
// @include      /https?://archiveofourown\.org/works/\d+/
// @grant        none
// @downloadURL none
// ==/UserScript==

(function($) {
    function doubleBreak() {
        var Break = $('#chapters').html().replace(/<br>/g,'<br><br>');
        $('#chapters').html(Break);
    }
    function deSpace() {
        $('<style>').text('#chapters br+br {display:none;}').appendTo($('head'));
        var nbsp = $('#chapters').html().replace(/&nbsp;/g, ' ');
        $('#chapters').html(nbsp);
    }
    $('<style>').text('.text-spacing {float: right; font-size: small; padding: 10px;}').appendTo($('head'));
    $('#chapters').before('<div class="text-spacing"><a class="double-break">insert line breaks</a> | <a class="de-space">remove line breaks</a></div>');
    $('.text-spacing .double-break').click(function() {
        doubleBreak();
    });
    $('.text-spacing .de-space').click(function() {
        deSpace();
    });

})(window.jQuery);