"useStrict"
var length = 4;
 
function cb() {
	console.log(this.length);
}
 
const object = {
	length: 5,
	method(cb) {
		cb();
	}
}
 
object.method(cb) // 

"useStrict"
var length = 4;
 
function cb() {
	console.log(this.length);
}
 
const object = {
	length: 5,
	method(cb) {
		cb();
	}
}
 
object.method(cb) //