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. lone low surrogate throws "URIError: malformed URI sequence"Ĭonsole.log(encodeURIComponent('\uDFFF')) lone high surrogate throws "URIError: malformed URI sequence"Ĭonsole.log(encodeURIComponent('\uD800')) Note that a URIError will be thrown if one attempts to encode a surrogate which is not part of a high-low pair, e.g., // high-low pair okĬonsole.log(encodeURIComponent('\uD800\uDFFF')) ! ~ * ' ( )ĮncodeURIComponent differs from encodeURI in that it encodes reserved characters and the Number sign # of encodeURI: TypeĪlphabetic, decimal digits, - _. DescriptionĮncodeURIComponent escapes all characters except the following: alphabetic, decimal digits, - _. Return valueĪ new string representing the provided string encoded as a Uniform Resource Identifier (URI) component. Syntax encodeURIComponent(str) Parameters str String. In the below example, we decode an encoded URL using decodeURI() and decodeURIComponent() methods into its original form.Ĭonst encodedURLComponent = encodeURIComponent(url) ĭocument.write('Decoded URL: ' + decodedURI)Ĭonst decodedURLComponent = decodeURIComponent(encodedURLComponent) ĭocument.The encodeURIComponent() function encodes a Uniform Resource Identifier (URI) component by replacing each instance of certain characters by one, two, three, or four escape sequences representing the UTF-8 encoding of the character (will only be four escape sequences for characters composed of two "surrogate" characters). These functions will return the decoded format of the encoded URL. The decodeURI only decodes the URI part, whereas this method decodes the URL, including the domain name.Įncoded_URI URI − It takes input for the encoded URL created by the encodeURI() function.Įncoded_URL URL − It takes input for the encoded URL created by the encodeURIComponent() function. The decoding of a URL can be done using the following methods −ĭecodeURI() function − The decodeURI() function is used to decode the URI, i.e., converting the special characters back to the original URI language.ĭecodeURIComponent() function − This function decodes the complete URL back to its original form. In the below example, we encode a URL using encodeURI() and encodeURIComponent() methods.ĭocument.write('Encoded URL: ' + encodedURI)Ĭonst encodedURLComponent=encodeURIComponent(url) ĭocument.write('Encoded URL Component: ' + encodedURLComponent) The above functions return the encoded URL. The component encodes the domain name also.ĮncodeURIComponent(complete_url_string ) ParameterĬomplete_uri_string string − It holds the URL to be encoded.Ĭomplete_url_string string − It holds the complete URL string to be encoded. Some of the characters that are not encoded are: (, / ? : & = + $ #).ĮncodeURIComponent() function − This function encodes the whole URL instead of just the URI. The conversion of the special characters can be done by using the following method from JavaScript −ĮncodeURI() function − The encodeURI() function is used for encoding the complete URI, i.e., converting the special characters from the URI into browser understandable language. Many browsers automatically encode and decode the URL and the response string.Į.g., A space " " is encoded as a + or %20. The query params must also be encoded in the URL string, where the server will decode this. It is a usual task in web development, and this is generally done while making a GET request to the API with the query params. Encoding and decoding the URI and the URI components is required by the URL of any website to reach or redirect the user.
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