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multiplication quiz in basic HTML+Javascript
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| <!DOCTYPE HTML> | |
| <html> | |
| <head> | |
| <title> multiplication flashcard </title> | |
| <script> | |
| // shared variables | |
| var term1 = 0; | |
| var term2 = 0; | |
| var score = 0; | |
| var num_tries = 0; | |
| // The main part of the program | |
| function myMain(event){ | |
| document.getElementById("topbox").innerHTML = "<h1> HELLO </h1>"; | |
| newProblem(); | |
| document.getElementById('answertext').addEventListener('keydown', (ev) => { | |
| if (ev.key === 'Enter') { | |
| checkAnswer(ev); | |
| } | |
| }); | |
| } | |
| function newProblem(){ | |
| term1 = Math.floor(Math.random()*13); | |
| term2 = Math.floor(Math.random()*13); | |
| document.getElementById("probbox").innerHTML = "<h1>"+term1+"×"+term2+"</h1>"; | |
| document.getElementById('answertext').value = ""; | |
| updateScore(); | |
| } | |
| function updateScore(){ | |
| document.getElementById("scorebox").innerHTML = "<h3> Score = "+100*(score/num_tries)+" %</h3>"; | |
| document.getElementById("scorebox").innerHTML += score+" right out of "+num_tries+" tries"; | |
| } | |
| function checkAnswer(ev){ | |
| val = parseInt(ev.target.value); | |
| num_tries = num_tries + 1; | |
| if( val == term1*term2 ){ | |
| document.getElementById("topbox").innerHTML = "<h1>CORRECT</h1>"; | |
| score = score + 1; | |
| newProblem(); | |
| }else{ | |
| document.getElementById("topbox").innerHTML = "<h1>WRONG</h1>"; | |
| updateScore(); | |
| } | |
| } | |
| // Tell the page to run myMain after the page (HTML) is loaded | |
| document.addEventListener('DOMContentLoaded', myMain, false); | |
| </script> | |
| </head> | |
| <body> | |
| <!-- This is what you see --> | |
| <div id="topbox"></div> | |
| <div id="scorebox"></div> | |
| <div id="probbox"></div> | |
| <div id="answerbox"> | |
| <input id="answertext" type="text" id="ans"> | |
| </div> | |
| </body> | |
| </html> |
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