Sign upSign InSign upSign InMember-only storyShalitha SurangaFollowLevel Up Coding--ShareEvery programming Language typically comes with developer-productivity-focused grammar and a fully-featured standard library. A generic programming language grammar specification contains several elements, such as literals, identifiers, expressions, functions, classes, etc. These elements typically use reserved words known as Keywords that we can’t use for custom identifiers. Most developers don’t tend to learn all language keywords while learning a new programming language — but knowing all keywords of a particular language enhances your language mastery and boosts your productivity during programming.Modern JavaScript has about 46 reserved, implemented keywords and several unimplemented reserved ones. Some of them came with early JavaScript implementations, and current ECMAScript specifications introduced several new keywords too. Every programmer usually knows about keywords like if, else, return, for, while, and function, but there are some keywords that we don’t frequently use as previously mentioned basic ones.In this story, I’ll discuss some JavaScript keywords that you should know as an experienced JavaScript developer. Knowing these keywords apart from well-known keywords will help to write clean JavaScript code productively without spending time on technical forums. Also, experienced developers can use these keywords to test the JavaScript language experience of other developers during technical interviews. Moreover, these keywords motivate you to study JavaScript internals deeply.We frequently use JavaScript objects in our source codes, so manipulating objects becomes mandatory in JavaScript environments. Adding and modifying object properties is so easy with the generic . notation. The delete keyword helps you remove a specific property from a JavaScript object:Deleting an array element won’t affect the array size, but it empties the selected element, so you have to…----Level Up CodingProgrammer | Author of Neutralinojs | Technical WriterShalitha SurangainLevel Up Coding--4Prathamesh GadekarinLevel Up Coding--5Ahmed BesbesinLevel Up Coding--18Shalitha SurangainLevel Up Coding--Victor TimiinLevel Up Coding--12Satyam Verma--1Allen HeltoninMomento Serverless--1Jeswanth ReddyinVersion 1--9Coding BeautyinDev Genius--9Ali HuseninJavaScript in Plain English--4HelpStatusWritersBlogCareersPrivacyTermsAboutText to speechTeams