ecma syntax not getting recognized in traspilation

Abhi

when i use override(SignUpModal.prototype, 'body', (original) => { then the "this " inside override is undefined but when i use this override(SignUpModal.prototype, 'body', function(original) { then "this" is getting recognized. Why ecma systex is not working?
i am using only gulp and flarum-gulp to transpile

even when i use function(original) and "this" is getting recognized i get message below when transpiling

SyntaxError in plugin 'gulp-babel'
Message:
D:/xampp/htdocs/flarum/extensions/unlikes/js/forum/src/main.js: Unexpected
token (82:1)

for this code http://laravel.io/bin/2W731

Toby

From MDN page on arrow functions:

An arrow function expression (also known as fat arrow function) has a shorter syntax compared to function expressions and lexically binds the this value.

i.e. the whole point of arrow functions is that this has the same value as the enclosing context.

You're getting a syntax error because you have unbalanced brackets.

Abhi

I am sorry it was sublime that was misguiding