能否支持一下添加id的功能### My Great Heading {#custom-id}

[LovelyAquarius]

please add the support for {#custom-id} syntax

[ChenXiaoMian]

$('[data-v-md-line]').each((index, el) => {
  const id = $(el).data('v-md-line');
  $(el).attr("id", `md-${id}`);
});

用jquery添加