| 1 | <!DOCTYPE html> |
| 2 | <html lang="es"> |
| 3 | |
| 4 | <head> |
| 5 | <meta charset="UTF-8"> |
| 6 | <meta name="viewport" |
| 7 | content="width=device-width"> |
| 8 | <title> |
| 9 | Formulario con 2 botones |
| 10 | </title> |
| 11 | </head> |
| 12 | |
| 13 | <body> |
| 14 | <form |
| 15 | action=javascript:procSuma()> |
| 16 | <h1> |
| 17 | Formulario con 2 botones |
| 18 | </h1> |
| 19 | <p> |
| 20 | <label> |
| 21 | a |
| 22 | <input id=inA type=number |
| 23 | required min="0.1" max="100" |
| 24 | step="0.1"> |
| 25 | </label> |
| 26 | </p> |
| 27 | <p> |
| 28 | <label> |
| 29 | b |
| 30 | <input id=inB type=number |
| 31 | required min="0.1" max="100" |
| 32 | step="0.1"> |
| 33 | </label> |
| 34 | </p> |
| 35 | <p> |
| 36 | <button>Sumar</button> |
| 37 | <button formaction="javascript: |
| 38 | procResta()"> |
| 39 | Restar |
| 40 | </button> |
| 41 | </p> |
| 42 | </form> |
| 43 | <script> |
| 44 | function procSuma() { |
| 45 | const a = inA.valueAsNumber |
| 46 | const b = inB.valueAsNumber |
| 47 | const resultado = suma(a, b) |
| 48 | alert( |
| 49 | `${a} + ${b} = ${resultado}`) |
| 50 | } |
| 51 | |
| 52 | function procResta() { |
| 53 | const a = inA.valueAsNumber |
| 54 | const b = inB.valueAsNumber |
| 55 | const resultado = resta(a, b) |
| 56 | alert( |
| 57 | `${a} - ${b} = ${resultado}`) |
| 58 | } |
| 59 | |
| 60 | function suma(a, b) { |
| 61 | return a + b |
| 62 | } |
| 63 | |
| 64 | function resta(a, b) { |
| 65 | return a - b |
| 66 | } |
| 67 | </script> |
| 68 | </body> |
| 69 | |
| 70 | </html> |