JQuery
Selectors
- type: $('table')
- attribute: $('[date="2015-04-21"]')
- class: $('.even')
- id: $('#main')
Filters
Example
HTML
<html><head><title>Button Magic</title>
    <link rel='stylesheet' type='text/css' href='stylesheet.css'/>
    <script type='text/javascript' src='jquery.js'></script>
    <script type='text/javascript' src='script.js'></script>
    </head><body>
         <div><br/><strong>Click Me!</strong></div>   
    </body>
</html>
stylesheet.css
div {
    height: 60px;
    width: 100px;
    border-radius: 5px;
    background-color: #69D2E7;
    text-align: center;
    color: #FFFFFF;
    font-family: Verdana, Arial, Sans-Serif;
    opacity: 0.5;
}
script.js
$(document).ready(function(){
    $('div').mouseenter(function(){
        $('div').fadeTo('fast', 1.0);
    });
    $('div').mouseleave(function(){
        $('div').fadeTo('fast', 0.5);
    });
});
To Do List Example
HTML
<h2>To Do</h2>
<form name="checkListForm">
    <input type="text" name="checkListItem"/>
</form>
<div id="button">Add!</div>
<br/>
<div id="list"></div>
script.js
$(document).ready(function(){
    $('#button').click(function(){
        var toAdd = $('input[name=checkListItem]').val();
        $('#list').append('<div class="item">' + toAdd + '</div>');
    });
    $(document).on('click', '.item', function(){
        $(this).remove()
    });
});