There are more than 600 arrows in Unicode. These are the inline arrows function. The first difference between the normal function and arrow function … Differences & Limitations: Does not have its own bindings to this or super, and should not be used as methods. Rewrite the sum function with arrow function syntax: const sum = (a, b) => { return a + b } Like traditional function expressions, arrow functions are not hoisted, and so you cannot call them before you declare them. Arrow functions in ES6 allow you to remove some of that syntax along with refining how to handle ‘this’. Syntax and usage: If the arrow function contains one expression, and you omit the function’s curly braces, then the expression is implicitely returned. Again we assign an anonymous function to a named variable. If you want to understand why you can’t invoke an arrow function by putting parentheses immediately after it, you have to examine how expression bodies work: parentheses after an expression body should be part of the expression… You're also correct that a named function expression's name is only bound inside … Given how arrow functions work, the latter way of parenthesizing should be preferred from now on. 4.2 Arrow function. An arrow function looks similar to a function expression — it’s just shorter. So it sounds like a compact alternative, which means that it’s shorter and simpler compared to the traditional function syntax. An arrow function expression is an anonymous function expression written with the “fat arrow” syntax (=>). converting this function declaration to an arrow function expression, 1:23. is almost exactly the same as our first example, except for one difference. Do you know what it is? 1:33. An arrow function expression is a compact alternative to a traditional function expression, but is limited and can't be used in all situations. Yep, you got it. An arrow function expression is a compact alternative to a traditional function expression, but is limited and can’t be used in all situations. The syntax of the arrow function consists of zero or more parameters , an arrow => and then concludes with the function statements . 13.6.3 Parenthesizing arrow function with expression bodies #. I was about to dispute you @slebetman on technicality, since this is a (arrow) function expression and you end up with a named function (ie foo.name === 'foo').But only because it's in the initializer of a const *statement*—meaning it's not quite right to call this a "named async arrow function expression". 1:30. and this is the Kyle Simpson's answer: an arrow function is an expr, but we need surrounding parens b/c of "operator precedence" (sorta), so that the final parens to invoke the arrow-IIFE apply to the entire function and not to just the last token of its body. The typescript handbook currently has nothing on arrow functions. 1:26. In classic function expressions, the this keyword is bound to different values based on the context in which the function is called. Syntactically, the previous function can be … You can return values from the arrow function the same way as from a regular function, but with one useful exception. Arrow functions and this. 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