JQuery
jQuery
CS 380: Web Programming
CS 380
1
Downloading and using jQuery
UI
or download it, extract its .js files to your project
folder
documentation available on the jQuery UI API
page
the CSS is optional and only needed for widgets
at the end
CS 380
2
Looping over the DOM
Using the DOM
var elems = document.querySelectorAll("li");
for (var i = 0; i < elems.length; i++) {
var e = elems[i];
// do stuff with e
}
Using jQuery
$("li").each(function(idx, e) {
// do stuff with e
});
CS 380
3
Inside the jQuery each loop
$("li").each(function(idx, e) {
// do stuff with e
});
return false to exit the loop early
e is a plain old DOM object
? We can upgrade it again using $ if we want
$("li").each(function(idx, e) {
e = $(e); // do stuff with e
});
CS 380
4
Modifying DOM nodes
HTML attributes
DOM fields
title
.title
id
.id
class
.className
style="prop: value"
.style.prop = value
CS 380
5
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