We are required to write a JavaScript function that imitates a network request, for that we can use the JavaScript setTimeout() function, that executes a task after a given time interval.
Our function should return a promise that resolves when the request takes place successfully, otherwise it rejects
Example
Following is the code −
const num1 = 45, num2 = 48; const res = 93; const expectedSumToBe = (num1, num2, res) => { return new Promise((resolve, reject) => { setTimeout(() => { if(num1 + num2 === res){ resolve('success'); }else{ reject('failure'); }; }, 3000); }); }; expectedSumToBe(num1, num2, res).then((data) => { console.log(data); }).catch((err) => { console.log(err); }) expectedSumToBe(23, 56, 76).then((data) => { console.log(data); }).catch((err) => { console.log(err); })
Output
Following is the output in the console −
success failure