TamperMonkey script to change editor settings like fontSize for TradingView script editor

tradingview_editor_settings.js

// ==UserScript==
// @name         TradingView editor options
// @namespace    https://www.tradingview.com/
// @version      1.0
// @author       bespokoid
// @match        https://www.tradingview.com/*
// ==/UserScript==

(function() {
  document.addEventListener("load", event =>
  {
    // Wait for Ace to load his styles
    if (event.target.id == 'ace_editor.css' && (editor = ace.edit('editor'))) {

        // Editor options. For full list look here: https://github.com/ajaxorg/ace/wiki/Configuring-Ace
        editor = ace.edit('editor');
        editor.setOptions({
            fontSize: '16px',
            // selectionStyle: "line"|"text",
            // highlightActiveLine: true|false, //defauls to true
            highlightSelectedWord: true, // true|false,
            // readOnly: true|false,
            cursorStyle: "slim", // "ace"|"slim"|"smooth"|"wide",
            // mergeUndoDeltas: false|true|"always",
            // behavioursEnabled: true|false,
            // wrapBehavioursEnabled: true|false,
            // this is needed if editor is inside scrollable page
            autoScrollEditorIntoView: true, // defaults to false
            // copy/cut the full line if selection is empty, defaults to false
            // copyWithEmptySelection: true|false,
            // useSoftTabs: true|false, // defaults to false
            // navigateWithinSoftTabs: true|false, // false
            // enableMultiselect: true|false,
            // hScrollBarAlwaysVisible: boolean,
            // vScrollBarAlwaysVisible: boolean,
            // highlightGutterLine: boolean,
            // animatedScroll: boolean,
            // showInvisibles: boolean,
            // showPrintMargin: boolean,
            // printMarginColumn: number (defaults to 80)
            // shortcut for showPrintMargin and printMarginColumn
            // printMargin: false|number,
            // fadeFoldWidgets: boolean,
            // showFoldWidgets: boolean, // defaults to true
            // showLineNumbers: boolean, // defaults to true
            showGutter: false, // defaults to true
            // displayIndentGuides: boolean, // defaults to true

            // fontFamily: css font-family value,

            // resize editor based on the contents of the editor until the number of lines reaches maxLines
            // maxLines: number,
            // minLines: number,

            // number of page sizes to scroll after document end (typical values are 0, 0.5, and 1)
            // scrollPastEnd: number|boolean,
            // fixedWidthGutter: boolean (defaults to false),
            // theme: path to a theme e.g "ace/theme/textmate", //Wouldn't work in case of TV :(
        });

        // Session options
        editor.session.setUseWrapMode(true);
        // editor.session.setFirstLineNumber(1);
        // editor.session.setOverwrite(boolean);
        // editor.session.setNewLineMode("auto" | "unix" | "windows");
        // editor.session.setUseWorker(boolean);
        // editor.session.setUseSoftTabs(boolean);
        // editor.session.setTabSize(number);
        // editor.session.setWrap(boolean|number);
        // editor.session.setFoldStyle("markbegin"|"markbeginend"|"manual");
        // editor.session.setMode(path to a mode e.g "ace/mode/text");

        // Theming. Still in work :(
        // ace.config.set('basePath','https://ace.c9.io/build/src/');
        // editor.setTheme("ace/theme/monokai");
    }
  }, true);
})();