I’m working on a project where this string ^\S+@demo\.com$ is stored in a parameter.
It’s possible to retrieve it in the JS part using @Params.RegexMail.
I can’t modify the value of @Params.RegexMail beforehand.
I tried to do console.log("@Html.Raw(@Params.FiltreEmail)"); and even
var x = "@Html.Raw(@Params.FiltreEmail)".replace("\\", "\\\\");
console.log(x);
but both ways ended up by returning ^S+@demo.com$.
My goal is to be able to define the following regex:
var exp = ("@Html.Raw(@Params.FiltreEmail)" !== "") ? "@Html.Raw(@Params.FiltreEmail)" : "(.*)";
var regex = new RegExp(exp);
How can I achieve this ?
>Solution :
The .replace("\\", "\\\\") would only replace the FIRST set, but they would already have been lost when declared.
Instead use server side JSON encode:
// @using System.Web.Helpers
let escapedRegex = `^\\S+@demo\\.com$` // "@Html.Raw(Json.Encode(Params.FiltreEmail))"; // Server-side rendering happens here
console.log(escapedRegex); // Check if the escaping is done right
let exp = escapedRegex? escapedRegex : "(.*)";
let regex = new RegExp(exp);
console.log(regex); // This should now show /^\S+@demo\.com$/ or /(.*)/