You might be doing JavaScript development for a long time but sometimes you might be not updated with the newest features which can solve your issues without doing or writing some extra codes. These techniques can help you to write clean and optimized JavaScript Code. Moreover, these topics can help you to prepare yourself for JavaScript interviews in 2021. Here I am coming with a new series to cover shorthand techniques that help you to write more clean and optimized JavaScript Code. This is a Cheat list for JavaScript Coding you must know in 2021. 1. If with multiple conditions We can store multiple values in the array and we can use the array includes method. //longhand if (x === 'abc' || x === 'def' || x === 'ghi' || x ==='jkl') { //logic } //shorthand if (['abc', 'def', 'ghi', 'jkl'].includes(x)) { //logic } 2. If true … else Shorthand This is a greater short cut for when we have if-else conditions that d...