How to Properly Encode URLs in JavaScript for GET Requests?

How to Encode URLs in JavaScript for GET Strings

When working with GET requests, it's crucial to encode URLs to ensure proper transmission. In JavaScript, this can be achieved using the built-in functions encodeURIComponent() and encodeURI().

encodeURIComponent(str)

This function encodes all characters in a string, except those reserved for use in URLs, such as ?, &, and #. This method is suitable for encoding parameter values in GET strings.

encodeURI(str)

This function encodes all characters in a string, including those reserved for URLs. It's ideal for encoding an entire URL, including the protocol, hostname, and path.

Example

Consider the following URL:

http://example.com/index.html?param=1&anotherParam=2

To encode it for use in a GET string, you would need to encode the value of the param parameter:

var encodedUrl = "http://example.com/index.html?param=" + encodeURIComponent("1");

This will result in the following encoded URL:

http://example.com/index.html?param=1%26anotherParam=2

Note that the & symbol is not encoded, as it's a reserved character in URLs.

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