Difference between decodeURIComponent() and decodeURI() functions in JavaScript
Both decodeURI() and decodeURIComponent() are Javascript global functions that are used for decoding encoded URI (Uniform Resource Identifier).
decodeURI() function: It decodes a string previously encoded by encodeURI() function. It returns a decoded URI by replacing each UTF-8 escape sequence with the characters it represents.
- Syntax:
decodeURI(encodeURI(x));
- Parameter It contains single parameter that includes a string previously encoded by encodeURI() function and hence result will be x again.
- Example: This example using decodeURI() function.
HTML
<!DOCTYPE html><html><head> <title>decodeURI() Example</title></head><body> <script type="text/javascript"> var decodeText1 = decodeURI('http://www.testing.com/'); document.write(decodeText1); document.write("<br>"); var decodeText2 = decodeURI('http%3A%2F%2Fwww.testing.com%2F'); document.write(decodeText2); </script></body></html> |
- Output:
http://www.testing.com/ http%3A%2F%2Fwww.testing.com%2F
decodeURIComponent() function: It decodes a string previously encoded by encodeURIComponent() function. It returns a decoded URI Component by replacing each UTF-8 escape sequence with the characters it represents. It can decode any value between %00 and %7F.
- Syntax:
decodeURIComponent(encodeURIComponent(x));
- Parameter Single parameter that includes a string previously encoded by encodeURIComponent() and hence result will be x again.
- Example: This example is on decodeURIComponent()
HTML
<!DOCTYPE html><html><head> <title>decodeURIComponent() Example</title></head><body> <script type="text/javascript"> var decodeText1 = decodeURIComponent( document.write(decodeText1); document.write("<br>"); var decodeText2 = decodeURIComponent( 'http%3A%2F%2Fwww.testing.com%2F'); document.write(decodeText2); </script></body></html> |
- Output:
http://www.testing.com/ http://www.testing.com/
Note:Both functions throw URIError indicating that one or more of the escape sequences in string is malformed and cannot be correctly decoded.
Difference between decodeURIComponent() and decodeURI() Function:
- decodeURI(): It takes encodeURI(url) string so it cannot decoded characters (, / ? : @ & = + $ #)
- decodeURIComponent(): It takes encodeURIComponent(url) string so it can decode these characters.
- decodeURI(): It takes encodeURI(url) string as parameter and returns the decoded string.
- decodeURIComponent(): It takes encodeURIComponent(url) string as parameter and returns the decoded string.
- decodeURI(“%41”): It returns “A”
- decodeURIComponent(“%41”) It returns “A”
- decodeURI(“%26”): It returns “%26”
- decodeURIComponent(“%26”): It returns “&”
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