SOURCE

document.querySelector("#version").addEventListener("input", (e) => {
    const version = e.target.value;
    const value =
        '6' +
        version
            .split(".")
            .map((v, i) => Number(v).toString(16).padStart(i === 0 ? 1 : 2, '0'))
            .join("")
        ;
    document.querySelector("#value").innerText = value;
});

document.querySelector("#version").dispatchEvent(new Event("input"));

<div><a href="https://blog.csdn.net/Scoful/article/details/139330910" target="_blank">跳过微信过低版本验证的办法</a></div>
<div><a href="https://link3.cc/bigai" target="_blank">免梯子直连GPT4试用</a></div>
<br>
<div>微信版本号：</div>
<input placeholder="请输入" id="version" value="3.8.0.33" />
<div>转换数值：</div>
<div id="value"></div>

body {
    font-size: 20px;
}

input {
    width:150px;
    line-height: 30px;
    font-size: 20px;
}