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December 8, 2016 20:29
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Vanilla DOM counter
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>Vanilla JS MVC</title> | |
| </head> | |
| <body> | |
| <div class="counter"> | |
| <button id="up">+</button> | |
| <p id="count"></p> | |
| <button id="down">-</button> | |
| </div> | |
| <script> | |
| (function() { | |
| // MODEL: where we store all the data | |
| let value = 0; | |
| // VIEW: DOM nodes representing what is displayed on page | |
| const $count = document.getElementById('count'); | |
| const $up = document.getElementById('up'); | |
| const $down = document.getElementById('down'); | |
| // CONTROLLER: how user interaction translates to model changes | |
| $up.onclick = () => { | |
| value = value + 1; | |
| $count.innerHTML = value; | |
| }; | |
| $down.onclick = () => { | |
| value = value - 1; | |
| $count.innerHTML = value; | |
| }; | |
| // init page with current value | |
| $count.innerHTML = value; | |
| })() | |
| </script> | |
| </body> | |
| </html> |
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