RegExp in TypeScript

Question

How can I implement Regexp in TypeScript  My Example  var trigger    quot 2 quot  var regex   new RegExp    1-9  d 0 2     trigger      where I have exception in Chrome console

User · Answer

In typescript  the declaration is something like this   const regex   RegExp               using RegExp constructor   const regex   new RegExp

User · Answer

You can do just   var regex      1-9  d 0 2   g regex test  2      outputs true

User · Answer

I think you want to test your RegExp in TypeScript  so you have to do like this   var trigger    2       regexp   new RegExp    1-9  d 0 2          test   regexp test trigger   alert test           will display true   You should read MDN Reference - RegExp  the RegExp object accepts two parameters pattern and flags which is nullable can be omitted undefined   To test your regex you have to use the  test   method  not passing the string you want to test inside the declaration of your RegExp   Why test       Because alert   in TS accepts a string as argument  it is better to write it this way  You can try the full code here

User · Answer

x000D   x000D  const regex    myRegexp   console log  Hello myRegexp   replace regex   World         Hello World  x000D   x000D   x000D   The Regex literal notation is commonly used to create new instances of RegExp      regex needs no additional escaping       v      regex       gm                    start      end   optional modifiers  As others sugguested  you can also use the new RegExp  myRegex   constructor  But you will have to be especially careful with escaping  regex  12 d45 matches  12345  const regex   new RegExp  12  d45   const equalRegex    12 d45

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