Assignment-8

Assignment-8/Problem_1.js

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+//1. Write a function that can stop execution of a function for the number of milliseconds sent as an argument
+// Example:
+//  const func = async () => {
+//   console.log(“Printing before”)
+//   //Call your function here eg. sleep(3000)
+//   console.log(“Printing after”)
+// ()
+
+const sleep=(timeLimit)=>{
+    return new Promise((resolve,reject)=>{
+        setTimeout(()=>{
+            resolve({data:{name:"naziya",lang:"javascript",eng:true}})
+        },timeLimit)
+    })
+}
+
+console.log("printing before")
+
+const testAsyncFunction = async()=>{
+ const data= await sleep(3000)
+ console.log(data)
+ console.log("Data is fetched")
+}
+testAsyncFunction()
+console.log('Printing after')

Assignment-8/Problem_2.js

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+//2.  Using promises - write a function that fetches data from an API endpoint (GET https://reqres.in/api/users ). Log the data into the console once it is received
+
+
+let promiseResult= fetch('https://reqres.in/api/users')
+.then((res)=>{
+    return res.json()
+})
+.then((data)=>{
+    console.log(data)
+})
+
+
+// using async await
+
+
+const fetchdata= async()=>{
+    const data1= await fetch('https://reqres.in/api/users')
+    const sortedData= await data1.json()
+    console.log(sortedData)
+}
+
+fetchdata()

Assignment-8/Problem_3.js

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+//3. What will be printed to the console when the promise resolves and when it rejects?
+const testAsyncFunction = () =>{
+return new Promise((resolve, reject) =>{
+if (Math.random() > 0.5) {
+resolve('Test Resolve');
+} else {
+reject('Test Reject');
+}
+}).catch((err) =>{
+console.log('Error caught in testAsyncFunction: ', err);
+});
+};
+testAsyncFunction()
+.then((res) =>{
+console.log('Response in then block: ', res);
+})
+.catch((err) => console.log('Error in catch block: ', err))
+
+// In case where the Problem is resolved it will log
+"Response in then block: Test Resolved"
+//// In case where the Problem is rejected it will log
+"Error caught in testAsyncFunction: Test Reject"
+"Error in catch block: Test Reject"
+

Assignment-8/Problem_4.js

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+//What will be printed to the console?
+const testAsyncFunction = () =>{
+return Promise.reject('Test static reject');
+};
+testAsyncFunction()
+.then((res) =>{
+console.log('Response in then block', res);
+})
+.catch((err) => console.log('Error in catch block', err));
+

Assignment-8/Problem_5.js

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+//5. What will be printed to the console?
+const testAsyncFunction = () =>{
+    return new Promise((resolve, reject) =>{
+    if (Math.random() > 0.5) {
+    resolve('Test Resolve');
+    } else {
+    reject('Test Reject');
+    }
+    }).catch((err) =>{
+    console.log('Error caught in testAsyncFunction', err);
+    throw new Error('Forced error');
+    });
+    };
+    testAsyncFunction()
+    .then((res) =>{
+    console.log('Response in then block: ', res);
+    })
+    .catch((err) => console.log('Error in catch block: ', err));
+
+// In Case the promise gets rejected 
+
+// 'Error caught in testAsyncFunction:Test Reject'
+//  Error:Forced error
+

Assignment-8/Problem_6.js

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+// //Create a promise that makes a fetch call, but resolves with the data only 2 seconds after the data has been received in the fetch.
+
+// const fetchdelay=()=>{
+//    return new Promise((resolve,reject)=>{
+//         setTimeout(()=>{
+//             return resolve(fetch('https://reqres.in/api/users'))
+//         },5000)
+
+//     }).then((res)=>{
+//         return res.json()
+//    }).then((data)=>{
+//       console.log(data)
+//       console.log('Data is fetched')
+//    })
+
+// }
+// fetchdelay()
+// console.log('data fetching has started')
+
+
+// with the help of async and await 
+
+const fetchdelay=()=>{
+    return new Promise((resolve,reject)=>{
+         setTimeout(()=>{
+             return resolve(fetch('https://reqres.in/api/users'))
+         },1000)
+
+     })
+    }
+
+let delayfunc=async()=>{
+    let data= await fetchdelay()
+    let sorteddata =await  data.json()
+    console.log(sorteddata)
+    console.log('Data is fetched')
+}
+delayfunc()
+console.log('data fetching has started')
+