click to replace value, shift + click to append value using jquery - keyboard

Question

I have a list with items.
When I click any of these items, I copy its id-value into a form text-field.
Everytime I click, it replaces the value, which is correct by default. But what I would like to add, is a way for the user to hold down a key on their keyboard, and when they then click, they just .append whatever they just clicked into the same form field.
Here's my jQuery-code I'm using for the first/default scenario:
$(function(){
$('ul#filter-results li').click(function(){
var from = $(this).attr('id'); // get the list ID and
$('input#search').val(from+' ').keyup(); // insert into text-field then trigger the search and
$('input#search').focus(); // make sure the field is focused so the user can start typing immediately
});
});
Is there a way to implement some sort of keyboard key-listener?
Something like:
if (e.shiftKey){
.append('this text instead')
}
haven't tried out to see if shiftKey is even any valid name here

Answer 1

shiftKey is of one of the properties of the event object and is valid to be used. try this:
$(document).on('keyup click', function(e){
if (e.shiftKey) {
$('input#search').focus()
$('input#search').val(e.target.id)
}
})
DEMO

Answer 2

$('ul#filter-results').on('click', 'li', function(e) {
if(e.shiftKey) {
do something;
} else {
do something else;
}
});

Answer 3

There is a jQuery plugin for extended click.
You could try that or see how they have done it and implement it yourself.
ExtendedClick plugin
Hope this helps.

Answer 4

This is what I ended up with:
I switched over to altKey because shiftKey marked a lot of text when I clicked.
Didn't do anything besides it doesn't look good...
$(function(){
$('ul#filter-results li').click(function(e){
var text = $(this).attr('id'); // get the ID
var input = $('#search'); // form field to insert text into
if (e.altKey){ input.val(input.val()+', '+text+' ').keyup(); } // fetch whatever is already there, and add some more
else { input.val(text+' ').keyup(); } // just replace whatever is already there
$('#search').focus();
});
});
Thanks for good suggestions...