[TASK] Update introduction (#1448)

Releases: main, 13.4, 12.4

Co-authored-by: lina.wolf <[email protected]>

Author: github-actions[bot]

Documentation/Introduction/Index.rst

@@ -1,104 +1,64 @@
+:navigation-title: Introduction
 .. include:: /Includes.rst.txt
+..  _typoscript-syntax-typoscript-templates:
+..  _typoscript-syntax-typoscript-templates-usage:
+..  _introduction:
 
-.. _about:
-.. _introduction:
-.. _typoscript-syntax-typoscript-templates:
+============================
+Introduction into TypoScript
+============================
 
-============
-Introduction
-============
+TypoScript is a configuration language used to configure both the frontend
+output and the backend of a a TYPO3 web site.
 
-What is to be rendered on a page in the frontend,
-the menu structure, how content objects are displayed, etc. can be
-defined with TypoScript - often it is used in
-combination with the Fluid templating engine.
+TypoScript is not a programming language but a means of configuring the
+website.
 
-This document is a **reference**, used to lookup TypoScript templating
-:ref:`basic data types <data-types>`, :ref:`object types <cobject>`,
-:ref:`functions <functions>` and :ref:`conditions <conditions>`. This
-reference is not intended to give you a full introduction into the topic
-TypoScript.
+..  contents::
 
+..  _introduction-frontend-typoscript:
 
-What is TypoScript?
+Frontend TypoScript
 ===================
 
-TypoScript can have 2 meanings:
+Frontend TypoScript is mainly used to configure which data should be send to the
+Fluid templates.
 
-* **TypoScript syntax** is used in TypoScript templates and in
-  TSconfig
-* **TypoScript templates** are used to configure
-  the TYPO3 frontend rendering.
+It can also be used to define settings send to Extbase plugins, metadata for
+a whole page etc.
 
-Additionally, in TypoScript templates, you must differentiate between
+In the beginning of TYPO3, TypoScript was used as templating language. In modern
+project it is not common to do that anymore.
 
-* TypoScript **constants** (using the TypoScript constant syntax)
-* and Typoscript **setup**
+For an introduction see
+`Getting started: A quick introduction into TypoScript <https://docs.typo3.org/permalink/t3tsref:guide>`_.
 
-Though TypoScript does include "functions" and "objects" and "conditions"
-it is not a programming language. Think of it more as a configuration
-language. The results of the TypoScript setup are used to build a PHP
-array.
+..  _about-tsconfig:
 
-Basically think of TypoScript as a means to "configure" the **frontend**,
-while TSconfig is used to configure the **backend** (with a few exceptions
-to this principle)
+Backend TypoScript / TSconfig
+=============================
 
-Please read the following for an introduction:
+Backend TypoScript, also called TSconfig, can be used to configure the output
+of certain forms etc in the TYPO3 backend.
 
-* :ref:`TypoScript Syntax <typoscript-syntax>`
-  chapter for an introduction to the TypoScript
-  syntax
-* :ref:`guide` for an introduction to TypoScript configuration
-* The chapter :ref:`using-and-setting` describes how to use, set
-  and extend TypoScript.
+..  _about-page-tsconfig:
 
+Page TSconfig
+-------------
 
-.. _typoscript-syntax-typoscript-templates-usage:
+Page TSconfig can be made available globally, on a per site or per page level.
 
-Templating methods in TYPO3
-===========================
+For the possibilities see the
+`Page TSconfig Reference <https://docs.typo3.org/permalink/t3tsref:pagetoplevelobjects>`_.
 
+..  _about-user-tsconfig:
 
-TypoScript templates are used to drive frontend rendering.
+User TSconfig
+-------------
 
-A minimal amount of TypoScript will *always* be necessary to
-tell TYPO3 CMS which templating method to use.
-It could be any of the following.
-
-Best practice:
-
-- **Fluid templates:** Configure TYPO3 to use `Fluid <https://typo3.org/fluid>`__
-  for templating. This allows to use external HTML templates, but
-  with fluid-style variables with curly braces. A content object type
-  :ref:`cobj-fluidtemplate` is available, which uses Fluid
-  from inside TypoScript.
-
-  * See :ref:`t3sitepackage:start` for a complete walkthrough of creating a
-    sitepackage, which is the basis for a custom theme for your site.
-  * See :ref:`t3coreapi:adding-your-own-content-elements` for an
-    introduction on how to create your own content element types using
-    TypoScript :ref:`cobj-template`, Fluid and data processors.
-
-Other methods:
-
-
-- **External Templating Engines:** Any other templating system can be
-  used. It will be provided via an extension. In such a case TypoScript
-  may be used to delegate the rendering to that system.
-
-- **Custom PHP:** Configure TYPO3 to call your own PHP code which
-  generates content in any way you may prefer. This might include using
-  third party templating engines!
-
-- **TS content objects:** Build the page entirely using TypoScript
-  content objects. All these objects are highly configurable.
-
-Outdated methods:
-
-
-- **HTML templates:** Configure TYPO3 CMS to facilitate external HTML-
-  templates with markers and subparts using the :ref:`cobj-template`
-  content object type. This method is considered outdated and no
-  longer recommended.
+User TSconfig can be made available globally for certain user groups or certain
+users. It cannot be set for just one site or page. It can however override
+:ref:`about-page-tsconfig`.
 
+For the possibilities see the
+`User TSconfig reference <https://docs.typo3.org/permalink/t3tsref:usertoplevelobjects>`_.