Deleting empty lines after replacing with empty string

Asked Nov 26 '19 at 08:39

Active Nov 26 '19 at 09:42

Viewed 53 times

let data = `<?xml version="1.0" encoding="UTF-8"?>
<math xmlns="http://www.w3.org/1998/Math/MathML">
   <mn>1</mn>
   <mo>=</mo>
   <semantics>
      <mrow>
         <mn>2</mn>
      </mrow>
      <annotation encoding="text/plain">2</annotation>
   </semantics>
   <mspace linebreak="newline" />
   <mn>2</mn>
   <mo>=</mo>
   <semantics>
      <mrow>
         <mn>3</mn>
      </mrow>
      <annotation encoding="text/plain">3</annotation>
   </semantics>
</math>`

const regex = /<annotation\s*[^>]*>(.|\n)*?<\/annotation>/
while(regex.test(data)) {
  data = data.replace(regex, '')
}

console.log(data)

After replacing the annotation tags with empty string, I want to delete that empty line.

asked Nov 26 '19 at 08:39

Henok Tesfaye

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Never use `(.|\n)*?`. There is a native `[^]` construct to match any char in ES standard. Or workarounds like `[\s\S]` / `[\d\D]` / `[\w\W]` – Wiktor Stribiżew Nov 26 '19 at 08:40
Ok, how to delete those empty lines coming from replacing annotation tags with empty string? – Henok Tesfaye Nov 26 '19 at 08:44

Deleting empty lines after replacing with empty string

0 Answers0