Editing Bookmarklet (section)

===Example===
This example bookmarklet performs a Wikipedia search on any highlighted text in the web browser window. In normal use, the following JavaScript code would be installed to a bookmark in a browser<ref>Tested on [[Mozilla Firefox]], [[Opera (web browser)|Opera]], [[Safari (web browser)|Safari]], and [[Google Chrome|Chrome]]. Does not work in IE7 or IE8.  Original source: [http://math-www.uni-paderborn.de/~axel/bookmarklet.html Alex Boldt]</ref> bookmarks toolbar. From then on, after selecting any text, clicking the bookmarklet performs the search.
<syntaxhighlight lang="javascript" line="1">
javascript:(function() {
function se(d) {
    return d.selection ? d.selection.createRange().text : d.getSelection()
} 
var s = se(document); 
for (var i=0; i<frames.length && (s==null || s==''); i++) s = se(frames[i].document); 
if (!s || s=='') s = prompt('Enter%20search%20terms%20for%20Wikipedia',''); 
open('https://en.wikipedia.org' + (s ? '/w/index.php?title=Special:Search&search=' + encodeURIComponent(s) : '')).focus();
})();
</syntaxhighlight>

Bookmarklets can modify the [[URL|location]], e.g. to save a [[web page]] to the [[Wayback Machine]],
<syntaxhighlight lang="javascript">
javascript:location.href='https://web.archive.org/save/'+document.location.href;
</syntaxhighlight>

Open a new [[web browser]] window or tab, e.g. to show the source of a web resource if the web browser supports the [[view-source URI scheme]],
<syntaxhighlight lang="javascript">
javascript:void(window.open('view-source:'+location));
</syntaxhighlight>

Show info related to the current [[URL]], e.g.,
<syntaxhighlight lang="javascript">
javascript:alert('\tdocument.URL\n'+document.URL+'\n\tdocument.lastModified\n'+document.lastModified+'\n\tlocation\n'+location);
</syntaxhighlight>