Created
February 11, 2014 08:05
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raw calculator
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>JS Bin</title> | |
| <style> | |
| input[type=button] { | |
| width: 40px; | |
| height: 40px; | |
| margin: 5px; | |
| } | |
| input[type=text] { | |
| margin-top: 5px; | |
| height: 32px; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <script> | |
| function createButton(context, text, func) { | |
| var button = document.createElement("input"); | |
| button.type = "button"; | |
| button.value = text; | |
| button.onclick = func; | |
| context.appendChild(button); | |
| } | |
| window.onload = function() { | |
| var commands = ['1','2','3','4','5','6','7','8','9','0','+','-','*','/','='], | |
| container = document.createDocumentFragment(), | |
| inputResult = ''; | |
| for (var i = 0; i < commands.length; i++) { | |
| if (i % 3 === 0) { | |
| container.appendChild(document.createElement('br')); | |
| } | |
| createButton(container, commands[i], function(event){ | |
| var clicked = event.currentTarget.value, | |
| item = document.getElementById('result'); | |
| if (clicked === '=') { | |
| inputResult = item.value = eval(item.value); | |
| } else { | |
| inputResult += clicked; | |
| item.value = inputResult; | |
| } | |
| }); | |
| } | |
| container.appendChild(document.createElement('br')); | |
| var input = document.createElement('input'); | |
| input.type = 'text'; | |
| input.id = 'result'; | |
| container.appendChild(input); | |
| document.body.appendChild(container); | |
| }; | |
| </script> | |
| </body> | |
| </html> |
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