Now I am taking the value of the callBackUrl in my js method, then decoding it. This can actually transform it into a not functional URL. I am using Javascript method decodeURIComponent to decode an encoded URL. encodeURI(): Takes a URI as an argument and returns the encoded URI string.īe aware of not passing in the whole URL (including scheme, e.g., into encodeURIComponent(). decodeURI() is a built-in function in JavaScript that is used to decode a URI (Uniform Resource Identifier) that has been previously encoded with the.encodeURIComponent(): Takes a component of a URI as an argument and returns the encoded URI string.JavaScript offers a bunch of built-in utility functions which we can use to easily encode URLs. How can we achieve URL encoding in JavaScript: In order to successfully locate a resource on the web, it is necessary to distinguish between when a character is meant as a part of string or part of the URL structure. For example, the ? character denotes the beginning of a query string. Then after this % sign every special character has a unique code Why do we need URL encoding:Ĭertain characters have a special value in a URL string. URL encoding is also known as percentage encoding because it escapes all special characters with a %. We can observe in this example that all characters except the string notEncoded are encoded with % signs. The decodeURIComponent() function converts a URL encoded string back to its normal form. Note that decoding a full URI might change its meaning as some of the decoded characters could be. Javascript URL decoding using the decodeURIComponent() function. I'm having a tough time coming up with reasons to use the encodeURI() - I'll leave that to the smarter people.Ĭonsole.log(encodeURIComponent('?notEncoded=&+')) It uses UTF-8 encoding scheme to decode URI components. So if you can take the time, you always want to use encodeURIComponent() - before adding on name/value pairs encode both the name and the value using this function before adding it to the query string. A URL encoded this way will no longer work as a URL without unescaping it. ![]() It leaves various unimportant characters unescaped so that the URL remains as human readable as possible without interference. ![]() The second is everything you need to do to make sure nothing in your string interfers with a URL. But for simple data when you want to preserve the URL nature of what you are escaping, this works. ![]() However your unescaped '&'s would interfere with field delimiters, the '='s would interfere with field names and values, and the '+'s would look like spaces. With the first, you could copy the newly escaped URL into address bar (for example) and it would work. The reason both exist is that the first preserves the URL with the risk of leaving too many things unescaped, while the second encodes everything needed. So instead of having a POST comment key equal to "Thyme &time=again", you have two POST keys, one equal to "Thyme " and another (time) equal to again.įor application/x-www-form-urlencoded (POST), per, spaces are to be replaced by '+', so one may wish to follow a encodeURIComponent replacement with an additional replacement of "%20" with "+".To encode a URL, as has been said before, you have two functions: encodeURI() Encode URL: URL Encoding is a way to translate unprintable or reserved characters in an accepted format universally by the web browsers & the web servers, where the encoded information can be implemented to Uniform Resource Locators (URLs), Uniform Resource Names (URNs), Uniform Resource Identifiers (URIs). Note that the ampersand and the equal sign mark a new key and value pair. Not using encodeURIComponent on this variable will give comment=Thyme%20&time=again. For example, a user could type "Thyme &time=again" for a variable comment. To avoid unexpected requests to the server, you should call encodeURIComponent on any user-entered parameters that will be passed as part of a URI. EncodeURIComponent escapes all characters except the following: alphabetic, decimal digits, - _.
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