greasemonkey-scripts | Greasemonkey Firefox addon | Browser Plugin library
kandi X-RAY | greasemonkey-scripts Summary
kandi X-RAY | greasemonkey-scripts Summary
Scripts for Greasemonkey Firefox addon (and for other browsers that support userscripts)
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of greasemonkey-scripts
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QUESTION
I implemented this user script (open source under MIT/expat) to enable up/down arrows iteration (using the keyboard arrow keys) like this page - https://duckduckgo.com/?q=javascript&ia=web (try pressing the down arrow key there several times and then up arrow - js has to be whitelisted).
However, the viewport is always positioned the top-left of the highlighted/selected/active element. What is the easiest way to make it more like DDG where the active item does not always scroll the page and is roughly at the centre?
Both jQuery or Vanilla JS are OK.
Note: the script is available for installation here for now and is readable and useful in the context of metacpan searches such as https://metacpan.org/search?q=config . See https://userscripts-mirror.org/ .
...ANSWER
Answered 2018-Sep-16 at 16:37Sample of calculation for a vertical-centered position:
elt top position - elt height/2 - container height/2
Regarding your script, try to replace:
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