This is a playground to test Promises and this references
"use strict";
class Flow {
procedureA()
{
return new Promise((resolve, reject) => {
return resolve("foo");
});
}
procedureB(){
return this.procedureA();
}
procedureC()
{
return new Promise((resolve, reject) => {
return resolve("bar");
});
}
procedureD()
{
return new Promise((resolve, reject) => {
return resolve("zoo");
});
}
}
flow.procedureC().then(flow.procedureB)
const flow = new Flow();
flow.procedureB().then(function(result){
console.log("SHOULD BE FOO", result)
}); // executes without problems
// .then changes "this" reference in flow.procedureB
// Therefore the instance is not able to call procedureA
flow.procedureC().then(flow.procedureB).then(function(){
console.log("SHOULD NOT HAPPEN")
}).catch(function(e){
console.log("ERROR")
console.log(e.stack)
})
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