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how to pass special character (e.g. %) through url for create new event in google calendar

I am creating a new event in google calendar by the following URL structure.

   https://calendar.google.com/calendar/r/eventedit?
   text=discount for Asgardian&
   dates=20200327T032400Z/20200327T032400Z&
   details=Thor will be there to receive you&
   location=Asgard&
   trp=false&sprop=&sprop=name:

here is a URL variable text, which represents the title of an event.

if I pass a plain string, it works well. but if I pass special character like '%' (e.g. 20% off for Asgardian), then google calendar gave me - 

  Bad Request 
  Error 400

how can I pass '%'?

(same error for details vaiable also)

Solution

  • in the comment, @terry gave me answer for how to pass % through URL. I need to encode it as %25.

    he also share that - Javascript has a built-in function for this URL encoding. encodeURIComponent()

    if we wrap our string by encodeURIComponent(), it'll give us URL encoded string.

    thanks.