URL Encode / URL Decode
decodeURIComponent() – JavaScript | MDN
encodeURIComponent() – JavaScript | MDN
encodeURIComponent()
// encodes characters such as ?,=,/,&,:
console.log(`?x=${encodeURIComponent('test?')}`);
// expected output: "?x=test%3F"
console.log(`?x=${encodeURIComponent('шеллы')}`);
// expected output: "?x=%D1%88%D0%B5%D0%BB%D0%BB%D1%8B"
decodeURIComponent()
// "JavaScript_шеллы"
decodeURIComponent('JavaScript_%D1%88%D0%B5%D0%BB%D0%BB%D1%8B');
try {
var a = decodeURIComponent('%E0%A4%A');
} catch(e) {
console.error(e); // URIError: malformed URI sequence
}