JavaScript object key case sensitive

JavaScript is a case-sensitive language . This means that language keywords, variables, function names, and any other identifiers must always be typed with a consistent capitalization of letters.

JavaScript is a case-sensitive language . This implies that the language keywords, variables, operate names, and the other identifiers should be typewritten with an identical capitalization of letters. So the identifiers Time and TIME can convey totally different meanings in JavaScript.

identifiers (including element names, classes, and IDs in selectors) are case-sensitive . HTML attributes id and class , of font names, and of URIs lies outside the scope of the CSS specification.