Breaks when using ES6 - "this" is no longe referencing the fact within condition or consequence

[damianofusco]

Breaks when using ES6 - "this" is no longe referencing the fact within condition or consequence:

// this breaks and this is an empty object in my case
condition: (R) => {
console.log('this', this); // prints {}
}

// this of course works and this contains my fact
condition: function(R) {
console.log('this', this); // prints the fact
}

[mattbishop]

+1

[xaricx]

+1

Workaround: Remove "=>" syntax and go back to function() for your rules. Example:

condition: function(R){...}

[daxiang28]

For some reason, the NPM version isn't in sync with the master branch here. The fix from @jaymaycry works. Just install it like so: npm install git://github.com/mithunsatheesh/node-rules.git#master --save

[nikollatesla]

Its not possible since we cannot rebind an arrow function. Let us know if you have any alternate thoughts on improving the syntax.

From the Spec:

Any reference to arguments, super, this, or new.target within an ArrowFunction must resolve to a binding in a lexically enclosing environment. Typically this will be the Function Environment of an immediately enclosing function.

http://www.ecma-international.org/ecma-262/6.0/#sec-arrow-function-definitions-runtime-semantics-evaluation