How to remove indent from innerHTML - Stack Overflow

Question

solved

Hello, everyone:

If you want to use template to write Markdown in the tag, then use js to process Markdown and convert it into html, the local dom structure is as follows:

<p class="content">
  <template type="markdown">
    Welcome
    ====
    My name is Hung
  </template>
</p>
<script type="text/javascript">
  document.addEventListener('DOMContentLoaded' ,function (event){
    var $templates = document.querySelectorAll('template[type="markdown"]')
    $templates.forEach(function ($template){
      console.log(marked($template.innerHTML));
    })
  })
</script>

But because the template tag is indented, marked treats the content as paragraph code:

Is there any way to clear these indents without affecting the normal indentation method, or other methods that do not use the template tag?

Answer 1

To give you an idea, count the whitespace characters in front of each line, get a minimum value, and then press this minimum value to clear it

Add the code

document.querySelectorAll('template[type="markdown"]').forEach($template => {
  var lines = $template.innerHTML.split(/\r\n|\n/)

  var trimLen = lines.reduce((minLen, line) => {
    var len = (/\S/.exec(line) || {index: 0}).index
    if (len < minLen) { return len }
    return minLen
  }, Infinity)

  if (trimLen > 0) {
    lines = lines.map(line => line.slice(trimLen))
  }

  console.log(marked(lines.join('\n')))
})

Answer 2

document.querySelectorAll('template[type="markdown"]').forEach(($template) => {
  let lines = $template.innerHTML.split('\n')
  let linesNum = lines.length
  if (linesNum > 0){
    !!/^\s*$/.test(lines[0]) && lines.shift()
    !!/^\s*$/.test(lines[linesNum-1]) && lines.pop()
  }
  let markdown = lines.map(line => line.substring(Math.min(...lines.map(line => line.match(/^\s*/)[0].length)))).join('\n')
  $template.parentElement.innerHTML = marked(markdown)
})