保留用户自定义设置 -

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>用户设置</title>
</head>
<style>
    h1{
        font-size: 16px;
        color: black;
    }
</style>
<body>
    <input type="text" placeholder="请输入文字颜色" id="color">
    <button onclick="setColor()">设置文字颜色</button>
    <input type="text" placeholder="请输入文字大小" id="fontSize">
    <button onclick="setFontSize()" id="size">设置字体大小</button>
    <h1 id="h1">我是用户自定义的样式</h1>
</body>
<script>
    var h1 = document.getElementById('h1');
    function setColor() {
        var color = document.getElementById('color').value
        if (color){
            localStorage.setItem('color',color);
            h1.style.color = color;
        }else {
            alert('请输入您要设置的值')
        }
    }
    function setFontSize() {
        var fontSize = document.getElementById('fontSize').value
        if (fontSize){
            localStorage.setItem('fontSize',fontSize);
            h1.style.fontSize = fontSize;
        }else {
            alert('请输入您要设置的值')
        }
    }
    onload= function () {
        var color = localStorage.getItem('color');
        var fontSize = localStorage.getItem('fontSize');
        h1.style.fontSize = fontSize;
        h1.style.color = color;
    }
</script>
</html>