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Event Delegation
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| <body> | |
| <ul> | |
| <li class="list-1">Item 1</li> | |
| <li class="list-2">Item 2</li> | |
| <li class="list-3">Item 3</li> | |
| <li class="list-4">Item 4</li> | |
| <li class="list-5">Item 5</li> | |
| </ul> | |
| <p><a href="#">Linkypoo</a></p> | |
| <accordion> | |
| <pane>Content 1</pane> | |
| <pane>Content 2</pane> | |
| <pane>Content 3</pane> | |
| </accordion> | |
| </body> | |
| <!-- **** JS **** --> | |
| <script> | |
| // 5 separate event listeners - Bad | |
| $('li').on('click', doSomething); | |
| </script> | |
| <script> | |
| // 1 single event listener - Good | |
| $('ul').on('click', 'li', doSomething); | |
| </script> | |
| <script> | |
| // 1 single event listener, but event will run if anything on <body> is clicked, including the link and the accordion. - Bad practice | |
| $('body').on('click', 'li', doSomething); | |
| </script> | |
| <script> | |
| var doSomething = function() { | |
| $(this).css('color', 'red'); | |
| }; | |
| </script> |
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