const decodeUriComponent = require('decode-uri-component');

decodeUriComponent('%25');
//=> '%'

decodeUriComponent('%');
//=> '%'

decodeUriComponent('st%C3%A5le');
//=> 'ståle'

decodeUriComponent('%st%C3%A5le%');
//=> '%ståle%'

decodeUriComponent('%%7Bst%C3%A5le%7D%');
//=> '%{ståle}%'

decodeUriComponent('%7B%ab%%7C%de%%7D');
//=> '{%ab%|%de%}'

decodeUriComponent('%FE%FF');
//=> '\uFFFD\uFFFD'

decodeUriComponent('%C2');
//=> '\uFFFD'

decodeUriComponent('%C2%B5');
//=> 'µ'