RegEx escape char in an internal script (tag) gets removed

[isocroft]

Package version

v1.0.0

Node.js and npm version

Node = v10.15.1
NPM = v6.4.1

Sample Code (to reproduce the issue)

<script type="text/javascript">
  var pl = /\+/g // the escape char (reverse solidus) is removed by edge and finally renders as `/+/g`
</script>

BONUS (a sample repo to reproduce the issue)