js动态添加css文件

function loadCSS(url) {
    var link = document.createElement('link');
    link.rel = 'stylesheet';
    link.href = url;
    document.head.appendChild(link);
}

// 使用示例
loadCSS('https://example.com/styles.css');

function loadCSS(url) {
    var link = document.createElement('link');
    link.rel = 'stylesheet';
    link.href = url;
    link.onload = function() {
        console.log('CSS 文件加载成功');
    };
    link.onerror = function() {
        console.error('CSS 文件加载失败');
    };
    document.head.appendChild(link);
}

// 使用示例
loadCSS('https://example.com/styles.css');

function loadCSSSync(url) {
    var link = document.createElement('link');
    link.rel = 'stylesheet';
    link.href = url;
    document.head.appendChild(link);
}

// 使用示例
loadCSSSync('https://example.com/styles.css');