JavaScript-Projects/bmi.html at main · srujana-manda/JavaScript-Projects · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>BMI Calculator</title>
    <style>

body{
    margin: 0;
    background: linear-gradient(to left bottom, lightgreen, lightblue);
    display: flex;
    min-height: 100vh;
    justify-content: center;
    align-items: center;
    font-family: 'Courier New', Courier, monospace;
}

.container{
    background: rgba(255,255,255, .3);
    padding: 20px;
    display: flex;
    flex-direction: column;
    border-radius: 5px;
    box-shadow: 0 10px 10px rgba(0,0,0,.3);
    margin: 5px;
}

.heading{
    font-size: 30px;
}

.input{
    padding: 10px 20px;
    font-size: 18px;
    background: rgba(255,255,255, .4);
    border-color: rgba(255,255,255, .5);
    margin: 10px;
}

.btn{
    background-color: lightgreen;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    margin: 10px;
    font-size: 20px;
    box-shadow: 0 0 4px rgba(0,0,0,.3);
    cursor: pointer;
}

.btn:hover{
    box-shadow: 0 0 8px rgba(0,0,0,.3);
    transition: all 300ms ease;
}

.info-text{
    font-size: 20px;
    font-weight: 500;
}
    </style>
</head>
<body>
    <div class="container">
        <h1 class="heading">Body Mass Index (BMI) Calculator</h1>
        Your Height (cm):
        <input type="number" class="input" id="height" value="180" placeholder="Enter your height in cm">
        Your Weight (kg):
        <input type="number" class="input" id="weight" value="80" placeholder="Enter your weight in kg">
        <button class="btn" id="btn">Compute BMI</button>
        <input disabled type="text" class="input" id="bmi-result">
        <h4 class="info-text">Weight Condition: <span id="weight-condition"></span></h4>
    </div>
    <script>
const btnEl = document.getElementById("btn");
const bmiInputEl = document.getElementById("bmi-result");
const weightConditionEl = document.getElementById("weight-condition");

function calculateBMI() {
  const heightValue = document.getElementById("height").value / 100;
  const weightValue = document.getElementById("weight").value;

  const bmiValue = weightValue / (heightValue * heightValue);

  bmiInputEl.value = bmiValue;

  if (bmiValue < 18.5) {
    weightConditionEl.innerText = "Under weight";
  } else if (bmiValue >= 18.5 && bmiValue <= 24.9) {
    weightConditionEl.innerText = "Normal weight";
  } else if (bmiValue >= 25 && bmiValue <= 29.9) {
    weightConditionEl.innerText = "Overweight";
  } else if (bmiValue >= 30) {
    weightConditionEl.innerText = "Obesity";
  }
}

btnEl.addEventListener("click", calculateBMI);
    </script>
</body>
</html>