复制内容到剪贴板

<script>
    async function copyText(e, text) {
        await navigator.clipboard.writeText(text);
        e.innerText = '已复制';
        setTimeout(() => {
            e.innerText = '复制';
        }, 2000);
    }
    window.copyText = copyText;
</script>
<button onclick="copyText(this, '要复制的文本')">复制</button>