fix: readme

Author: BCsabaEngine

README.md

@@ -16,6 +16,8 @@ This npm package provides a solution for **inserting any JS client application i
 
 > Starting with version v1.3.0, c++ defines can be used.
 
+> Version v1.4.0 has a breaking change! --no-gzip changed to --gzip. Starting with this version c++ compiler directives are available to setup operation in project level.
+
 ### Usage
 
 **Install package** as devDependency (it is practical if the package is part of the project so that you always receive updates)
@@ -160,7 +162,10 @@ All modern browsers have been able to handle gzip-compressed content for years.
 
 During the translation process, data in gzip format is generated and will be used if the **size is greater than 100 bytes** and we experience a **reduction of at least 15%**. In such a case, the compressed data is unconditionally sent to the browser with the appropriate **Content-Encoding** header information.
 
-Automatic compression can be turned off with the `--no-gzip` option.
+Automatic compression can be turned off with the `--gzip=false` option.
+
+> This setting has three states: yes, no, and compiler mode is available. In compiler mode, you can disable/enable Gzip by setting the `SVELTEESP32_ENABLE_GZIP` c++ compiler directive.
+> For example, if using platformio, you can use `-D SVELTEESP32_ENABLE_GZIP`.
 
 ### ETag
 
@@ -170,6 +175,9 @@ Since microcontroller data traffic is moderately expensive, it is an individual
 
 The use of ETag is **not enabled by default**, this can be achieved with the `--etag=true` switch.
 
+> This setting has three states: yes, no, and compiler mode is available. In compiler mode, you can disable/enable ETag by setting the `SVELTEESP32_ENABLE_ETAG` c++ compiler directive.
+> For example, if using platformio, you can use `-D SVELTEESP32_ENABLE_ETAG`.
+
 ### Main entry point - index.html
 
 Typically, the entry point for web applications is the **index.htm or index.html** file. This does not need to be listed in the browser's address bar because web servers know that this file should be served by default. Svelteesp32 also does this: if there is an index.htm or index.html file, it sets it as the main file to be served. So using `http://esp_xxx.local` or just entering the `http://x.y.w.z/` IP address will serve this main file.
@@ -214,6 +222,9 @@ You can include a blocker error if a named file accidentally missing from the bu
 ...
 ```
 
+You can use the following c++ directives at the project level if you want to configure the usage there. Do not forget `--etag=compiler` or `--gzip=compiler` command line arg:
+`SVELTEESP32_ENABLE_ETAG` and `SVELTEESP32_ENABLE_GZIP`
+
 ### Command line options
 
 | Option        | Description                                                      | default                 |
@@ -222,7 +233,7 @@ You can include a blocker error if a named file accidentally missing from the bu
 | `-e`          | The engine for which the include file is created (psychic/async) | psychic                 |
 | `-o`          | Generated output file with path                                  | `svelteesp32.h`         |
 | `--etag`      | Use ETag header for cache (true/false/compiler)                  | false                   |
-| `--no-gzip`   | Do not compress content with gzip                                | false -> gzip used      |
+| `--gzip`      | Compress content with gzip (true/false/compiler)                 | true                    |
 | `--espmethod` | Name of generated method                                         | `initSvelteStaticFiles` |
 | `--define`    | Prefix of c++ defines                                            | `SVELTEESP32`           |
 | `-h`          | Show help                                                        |                         |