How-Good-Your-Math-Skills-Are/index.html at main · code-ga/How-Good-Your-Math-Skills-Are · GitHub

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<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>How Good Your Math Skills Are</title>
    <style>
      body {
        font-family: Arial, sans-serif;
        background-color: #f2f2f2;
        margin: 0;
        padding: 0;
      }

      .container {
        margin: 0 auto;
        padding: 20px;
        background-color: #d8d8d8;
        text-align: center;
      }

      h1 {
        color: #333;
      }

      .calculator {
        display: flex;
        justify-content: center;
        align-items: center;
        background-color: #fff;
        padding: 10px;
        border-radius: 5px;
        box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
      }

      .firstNumber,
      .secondNumber,
      .result {
        margin: 0 5px;
        padding: 5px;
        border: 1px solid #ccc;
        border-radius: 3px;
        font-size: 24px;
        font-weight: bold;
        color: #333;
      }

      .operator,
      .equals {
        font-size: 24px;
        font-weight: bold;
        color: #333;
      }
      .scores {
        display: flex;
        justify-content: center;
        align-items: center;
        background-color: #fff;
        padding: 10px;
        border-radius: 5px;
        box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
      }
      .scores h2 {
        margin: 0 10px;
      }
    </style>
  </head>
  <body>
    <div class="container">
      <h1>Show off your math skills</h1>
      <div class="scores">
        <h2>Score: <span id="score">0</span></h2>
        <h2>Time: <span id="time">0</span></h2>
      </div>
      <div class="calculator">
        <input class="firstNumber" type="number" />
        <div class="operator"></div>
        <input class="secondNumber" type="number" />
        <div class="equals">=</div>
        <input class="result" type="number" />
      </div>
    </div>
  </body>
  <script>
    const operators = ["+", "-", "*"];
    function getState() {
      const firstNumber = Math.floor(Math.random() * 100);
      const secondNumber = Math.floor(Math.random() * 100);
      const operatorIndex = Math.floor(Math.random() * operators.length);
      const operator = operators[operatorIndex];
      const result = eval(`${firstNumber} ${operator} ${secondNumber}`);
      return {
        firstNumber,
        secondNumber,
        operator,
        result,
        byInput: [firstNumber, secondNumber, result],
      };
    }
    let score = 0;
    let state = getState();
    let startTime = new Date();
    const render = () => {
      const hiddenInput = Math.floor(Math.random() * 2);
      const inputs = document.querySelectorAll("input");
      const operators = document.querySelectorAll(".operator");
      const scoreElement = document.querySelector("#score");
      const timeElement = document.querySelector("#time");
      scoreElement.textContent = score;
      timeElement.textContent = Math.floor((new Date() - startTime) / 1000);
      operators[0].textContent = state.operator;
      let index = 0;
      for (const val of state.byInput) {
        const currentInput = inputs[index];
        console.log(currentInput);
        if (index != hiddenInput) {
          currentInput.value = val;
          currentInput.readOnly = true;
        } else {
          currentInput.readOnly = false;
          currentInput.focus();
          currentInput.value = "";
          // if press enter, check answer
          currentInput.addEventListener("keydown", (e) => {
            if (e.key === "Enter") {
              const result = Number(currentInput.value);
              console.log(result, val);
              if (result == val) {
                score++;
                state = getState();
                render();
              }
            }
          });
        }
        index++;
      }
    };
    document.addEventListener("DOMContentLoaded", render);
  </script>
</html>