就是这个样的粗爆，手搓一个计算器：心率计算器-优快云博客

作为程序员，没有合适的工具，就得手搓一个，PC端，移动端均可适用。废话不多说，直接上代码。

HTML:

<div class="calculator"><div class="input-group"><label for="age">输入您的年龄：</label> <input id="age" min="1" required="" type="number" placeholder="请输入年龄"></div><button onclick="calculateHeartRate()">计算心率</button><div id="result" class="result"></div></div>

JS:

function calculateHeartRate() {
            const age = parseInt(document.getElementById("age").value);
            const resultDiv = document.getElementById("result");

            if (isNaN(age) || age <= 0) {
                resultDiv.innerHTML = "请输入有效的年龄！";
            
                return;
            }

            // 计算最大心率
            const maxHeartRate = 220 - age;

            // 不同心率区间
            const lightMin = Math.round(maxHeartRate * 0.50);
            const lightMax = Math.round(maxHeartRate * 0.60);

            const fatBurnMin = Math.round(maxHeartRate * 0.60);
            const fatBurnMax = Math.round(maxHeartRate * 0.70);

            const aerobicMin = Math.round(maxHeartRate * 0.70);
            const aerobicMax = Math.round(maxHeartRate * 0.80);

            const anaerobicMin = Math.round(maxHeartRate * 0.80);
            const anaerobicMax = Math.round(maxHeartRate * 0.90);

            const maxMin = Math.round(maxHeartRate * 0.90);
            const maxMax = maxHeartRate;

            // 显示结果
            resultDiv.innerHTML = `
                <div>您的最大心率为：<strong>${maxHeartRate} 次/分钟</strong></div>
                <div>心率区间：</div>
    
                    <div>轻度活动：<strong>${lightMin}-${lightMax} 次/分钟</strong></div>
                    <div>脂肪燃烧：<strong>${fatBurnMin}-${fatBurnMax} 次/分钟</strong></div>
                    <div>有氧耐力：<strong>${aerobicMin}-${aerobicMax} 次/分钟</strong></div>
                    <div>无氧耐力：<strong>${anaerobicMin}-${anaerobicMax} 次/分钟</strong></div>
                    <div>极限：<strong>${maxMin}-${maxMax} 次/分钟</strong></div>
     
            `;

        }

CSS:

.calculator {
    width: 100%;
    background-color: #333;
    color: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}


label {
    display: block;
    margin-bottom: 10px;
    font-size: 16px;
}

input, select {
    width: 100%!important;
    padding: 10px!important;
    margin-bottom: 20px;
       color: #000000; 
    border-radius: 5px;
    border: 1px solid #555;
    font-size: 16px!important;
    background-color: #ffffff!important;
}

button {
    width: 100%;
    padding: 10px;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
}

button:hover {
    background-color: orange;
}

.result {
  font-size: 18px;
    margin-top: 20px;
    text-align: center;
}

option {
        background-color: #ffffff;
}


p {
    font-size: 18px;
        margin-top: 5px!important;
}