> For the complete documentation index, see [llms.txt](https://tomelam.gitbook.io/mashweb/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://tomelam.gitbook.io/mashweb/part-8-tricks-to-augment-zens-basic-functions.md).

# Part 8: Tricks To Augment Zen's Basic Functions

The capabilities of a Zen web page could be augmented through (1) the web server that serves Zen web pages, (2) web browser extensions (plugins), and (3) some fancy JavaScript and web services.

## The web server that serves Zen web pages

The web server that serves Zen web pages could do such things as spawn a headless web browser with the [Selenium web driver](https://en.wikipedia.org/wiki/Selenium_\(software\)#Selenium_WebDriver) embedded in it. This web driver could be controlled by the web server to do such things as copy a web page and rebase URLs in the web page, so that relative paths are not broken.

## A web browser extension that allows web page embedding

The `<iframe>` HTML tag allows a web page to be embedded in another web page, but due to the [clickjacking](https://developer.mozilla.org/en-US/docs/Web/Security/Types_of_attacks#click-jacking) problem, most web servers send [X-Frame-Options](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Frame-Options) HTTP response headers with the web pages they serve to prevent the embedding of those web pages in other web pages. Google Chrome (and probably other web browsers) has [an extension](https://chrome.google.com/webstore/detail/ignore-x-frame-headers/gleekbfjekiniecknbkamfmkohkpodhe) to ignore these response headers, thus allowing any web page to be embedded. This extension should be used cautiously to avoid clickjacking attacks. This [100-second video](https://youtu.be/66rioWH60Ec) shows how to install and use the Chrome extension.

## Some JavaScript tricks

[Here's](https://www.geeksforgeeks.org/how-to-take-screenshot-of-a-div-using-javascript/) a trick to take a snapshot of part of a web page and [here's](http://demo.xpertdeveloper.com/html5-screenshot/) a trick to take a snapshot of a full web page. Note that the snapshots cannot include a web page embedded in an `<iframe>` element.

## A feature in Chrome 90 to create links to highlighted text in a web page

[A short article](https://www.theverge.com/2021/4/17/22389519/google-feature-chrome-90-highlighted-links) on The Verge describes this new, interesting feature of Google Chrome.