Function
const simple_promise_demo = (a, b) => {
return new Promise((resolve, reject) => {
if (b !== 0)
{
resolve(a/b)
}
else
{
let problem = new Error(a + ' / ' + b + ' -> Cant divide by zero!')
reject(problem)
}
})
}
Executing with valid parameters
simple_promise_demo(3, 5).then((result) => {
console.log(result)
}).catch((e) => {
console.log(e)
})
Returns
node promise.js
0.6
Executing with invalid parameters
simple_promise_demo(3, 0).then((result) => {
console.log(result)
}).catch((e) => {
console.log(e)
})
Returns
node promise.js
Error: 3 / 0 -> Cant divide by zero!
at Promise (/home/ubuntu/onews/playground/promise.js:9:27)
at new Promise (<anonymous>)
at simple_promise_demo (/home/ubuntu/onews/playground/promise.js:2:12)
at Object.<anonymous> (/home/ubuntu/onews/playground/promise.js:15:1)
at Module._compile (module.js:652:30)
at Object.Module._extensions..js (module.js:663:10)
at Module.load (module.js:565:32)
at tryModuleLoad (module.js:505:12)
at Function.Module._load (module.js:497:3)
at Function.Module.runMain (module.js:693:10)