How do I convert a string into a regular expression

54laoli45

For example: I return a string from the background: '(?: <Script. *?>) ((\n |\r |.) *?) (?: <\/ script>)'
   But in Javascript, the way we use Javascript is:
   var reg = /(?:<script.*?>)((\n|\r|.)*?)(?:<\/script>)/, then use the reg test method. . But I don't know how to use strings. .
   So please ask, heroes

haishion

var reg = new RegExp (string, type); // Pay attention to escaping. . type is optional case-insensitive img
// For example: matching numbers
var num = new RegExp ("\\d");
// match letters a to z (not case sensitive and match multiple)
var r = new RegExp ("[a-z]", "ig");

54laoli45

Someone helped me solve it so quickly, thank you very much. .