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Resolving or rejecting promises accordingly - JavaScript
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
Updated on: 18-Sep-2020
52 Views
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