擅长:python、mysql、java
<p>为了避免每次选择时都将datetime值附加到HTML中,我执行了以下操作:</p>
<pre><code> var span= document.getElementById("Div1");
if (typeof(span) != 'undefined' && span!= null)
{
span.textContent = currentDateTime;
}
else
{
span= document.createElement("div");
span.setAttribute("id", "Div1");
span.textContent = currentDateTime;
}
const test = document.querySelector("div#test");
test.parentNode.insertBefore(span, test.nextSibling)
</code></pre>