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September 17, 2015 23:47
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js calculator
// source http://jsbin.com/tenevo
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>JS Bin</title> | |
| <style id="jsbin-css"> | |
| span{ | |
| display: inline-block; | |
| width: 24px; | |
| height: 20px; | |
| border: 1px solid blue; | |
| text-align: center; | |
| padding: 5px; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <h1>My Calculator</h1> | |
| <input type="text" value=""> | |
| <p> | |
| <span>1</span> | |
| <span>2</span> | |
| <span>3</span> | |
| <span>+</span> | |
| </p> | |
| <p> | |
| <span>4</span> | |
| <span>5</span> | |
| <span>6</span> | |
| <span>-</span> | |
| </p> | |
| <p> | |
| <span>7</span> | |
| <span>8</span> | |
| <span>9</span> | |
| <span>*</span> | |
| </p> | |
| <p> | |
| <span>C</span> | |
| <span>0</span> | |
| <span>=</span> | |
| <span>/</span> | |
| </p> | |
| <script id="jsbin-javascript"> | |
| var input = document.querySelector("input"), | |
| val = document.querySelectorAll("span"), | |
| i=0, | |
| len=val.length; | |
| for(;i<len;i++){ | |
| val[i].addEventListener("click",getInput,false); | |
| } | |
| function getInput(e){ | |
| // console.log(typeof e.target.innerHTML); | |
| if(e.target.innerHTML === "="){ | |
| // console.log(input.value); | |
| input.value = eval(input.value); | |
| }else if(e.target.innerHTML==="C"){ | |
| input.value=""; | |
| }else{ | |
| input.value+=e.target.innerHTML; | |
| } | |
| } | |
| </script> | |
| <script id="jsbin-source-css" type="text/css">span{ | |
| display: inline-block; | |
| width: 24px; | |
| height: 20px; | |
| border: 1px solid blue; | |
| text-align: center; | |
| padding: 5px; | |
| }</script> | |
| <script id="jsbin-source-javascript" type="text/javascript">var input = document.querySelector("input"), | |
| val = document.querySelectorAll("span"), | |
| i=0, | |
| len=val.length; | |
| for(;i<len;i++){ | |
| val[i].addEventListener("click",getInput,false); | |
| } | |
| function getInput(e){ | |
| // console.log(typeof e.target.innerHTML); | |
| if(e.target.innerHTML === "="){ | |
| // console.log(input.value); | |
| input.value = eval(input.value); | |
| }else if(e.target.innerHTML==="C"){ | |
| input.value=""; | |
| }else{ | |
| input.value+=e.target.innerHTML; | |
| } | |
| }</script></body> | |
| </html> |
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| span{ | |
| display: inline-block; | |
| width: 24px; | |
| height: 20px; | |
| border: 1px solid blue; | |
| text-align: center; | |
| padding: 5px; | |
| box-sizing: border-box;/* added later , not tested , deleted it if output not good*/ | |
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| var input = document.querySelector("input"), | |
| val = document.querySelectorAll("span"), | |
| i=0, | |
| len=val.length; | |
| for(;i<len;i++){ | |
| val[i].addEventListener("click",getInput,false); | |
| } | |
| function getInput(e){ | |
| // console.log(typeof e.target.innerHTML); | |
| if(e.target.innerHTML === "="){ | |
| // console.log(input.value); | |
| input.value = eval(input.value); | |
| }else if(e.target.innerHTML==="C"){ | |
| input.value=""; | |
| }else{ | |
| input.value+=e.target.innerHTML; | |
| } | |
| } |
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