html - 为什么在选择选项中使用比较器时浏览器会生成一个空选项？

Question

此 HTML 在浏览器中生成一个空选项，它怎么可能？以及如何处理？

<select name="comparator" id="comparator">
    <option value="=="> Equals (==) </option>
    <option value="&gt"> Greater Than (&gt) </option>
    <option value="&lt"> Less Than (&lt) <option>
    <option value="&gt="> Greater Than/Equal (&gt=) </option>
    <option value="&gt="> Less Than/Equal (&gt=) </option>
</select>

标签： html

Answer 1

你没有关闭这个标签

 <option value="&lt"> Less Than (&lt) **<option>**




<select name="comparator" id="comparator">
    <option value="=="> Equals (==) </option>
    <option value="&gt"> Greater Than (&gt) </option>
    <option value="&lt"> Less Than (&lt) **<option>**
    <option value="&gt="> Greater Than/Equal (&gt=) </option>
    <option value="&gt="> Less Than/Equal (&gt=) </option>
</select>

应该：

<select name="comparator" id="comparator">
    <option value="=="> Equals (==) </option>
    <option value="&gt"> Greater Than (&gt) </option>
    <option value="&lt"> Less Than (&lt) </option>
    <option value="&gt="> Greater Than/Equal (&gt=) </option>
    <option value="&gt="> Less Than/Equal (&gt=) </option>
</select>