append
<p> <span class="s1">s1</span> </p> <script> $("p").append('<span class="s2">s2</span>'); </script>
结果是这样的:
<p> <span class="s1">s1</span> <span class="s2">s2</span> </p>
after
<p> <span class="s1">s1</span> </p> <script> $("p").after('<span class="s2">s2</span>'); </script>
结果是这样的:
<p> <span class="s1">s1</span> </p> <span class="s2">s2</span>
append/prepend 是在选择元素内部嵌入。
after/before 是在元素外面追加。
