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// let a = 10; // (function() { // console.log(a); // var a = 20; // console.log(a); // })(); // let obj = { a: 1, b: 2 }; // let newObj = { ...obj, a: 3 }; // console.log(newObj); // const a = {}; // const b = { key: "b" }; // const c = { key: "c" }; // a[b] = 123; // a[c] = 456; // console.log(a[b]); // let x = 5; // let y = x++; // console.log(x, y); // console.log(typeof NaN); // let arr = [1, 2, 3]; // arr[10] = 42; // console.log(arr.length); // console.log(arr); // function outerFunc() { // var x = 10; // return function innerFunc() { // console.log(x); // var x = 20; // }; // } // const fn = outerFunc(); // fn(); // const obj = { // value: 42, // method: function () { // console.log(this.value); // } // }; // obj.method(); // console.log("Start"); // setTimeout(() => console.log("Timeout"), 0); // Promise.resolve().then(() => console.log("Promise")); // console.log("End"); // console.log(Object.is(22, 22)); // console.log(+0 === -0); // console.log(Object.is(NaN, NaN)); // console.log(NaN === NaN); // console.log("Start"); // setTimeout(() => console.log("Timeout"), 0); // Promise.resolve().then(() => console.log("Promise 1")).then(() => console.log("Promise 2")); // console.log("End"); // console.log("Start"); // Promise.resolve().then(() => { // console.log("Promise 1"); // return Promise.resolve("Promise 2"); // }).then((value) => { // console.log(value); // }); // console.log("End"); // console.log("A"); // setTimeout(() => console.log("B"), 100); // Promise.resolve().then(() => { // console.log("C"); // setTimeout(() => console.log("D"), 50); // }); // console.log("E"); // console.log("A"); // setTimeout(() => console.log("B"), 0); // Promise.resolve().then(() => { // console.log("C"); // setTimeout(() => console.log("D"), 0); // }); // console.log("E"); // a e c b d // console.log("Start"); // setTimeout(() => console.log("Timeout"), 0); // Promise.resolve().then(() => { // console.log("Promise"); // while (Date.now() % 10 !== 0) {} // console.log("Blocking loop finished"); // }); // console.log("End"); // console.log("Start"); // Promise.resolve("Resolved").then((value) => { // console.log(value); // }); // console.log("End"); // console.log("Start"); // Promise.resolve().then(() => { // console.log("Step 1"); // return Promise.resolve("Step 2"); // }).then((value) => { // console.log(value); // return "Step 3"; // }).then(console.log); // console.log("End"); // start end step1 step2 step3 // recheck this imp // async function async1() { // console.log("Async1Start"); // await async2(); // console.log("Async1End"); // } // async function async2() { // console.log("Async2"); // } // console.log("Start"); // async1(); // Promise.resolve().then(() => console.log("Promise")); // console.log("End"); // start end async1start async2 async1end promise // recheck this // setTimeout(() => console.log("Timeout 1"), 0); // Promise.resolve().then(() => { // console.log("Promise 1"); // setTimeout(() => console.log("Timeout 2"), 0); // }); // setTimeout(() => console.log("Timeout 3"), 0); // Promise.resolve().then(() => console.log("Promise 2")); // promise1 promise2 timeout1 timeout3 timeout2 // setTimeout(() => { // console.log("1"); // Promise.resolve().then(() => console.log("2")); // console.log("3"); // }, 0); // Promise.resolve().then(() => console.log("4")); // 4 1 3 2 // recheck this // async function foo() { // console.log("1"); // await bar(); // console.log("2"); // } // async function bar() { // console.log("3"); // } // console.log("4"); // foo(); // console.log("5"); // 4 1 3 5 2 // console.log("1"); // Promise.resolve().then(() => { // console.log("2"); // return new Promise((resolve) => { // setTimeout(() => { // console.log("3"); // resolve(); // }, 1000); // }); // }).then(() => { // console.log("4"); // }); // console.log("5"); // 1 5 2 3 4 async function async1() { console.log("1"); await async2(); console.log("2"); } async function async2() { console.log("3"); return Promise.resolve().then(() => console.log("4")); } console.log("5"); async1(); Promise.resolve() .then(() => console.log("6")) .then(() => console.log("7")); console.log("8"); // 5 1 3 4 8 Promise.resolve() .then(() => { console.log("Step 1"); return Promise.resolve("Step 2"); }) .then((value) => { console.log(value); return new Promise((resolve) => { setTimeout(() => resolve("Step 3"), 1000); }); }) .then(console.log) .finally(() => console.log("Finally")); // 4 async function test() { console.log("Test Start"); await Promise.resolve(); console.log("Test After First Await"); await Promise.resolve(); console.log("Test After Second Await"); } console.log("Script Start"); test(); Promise.resolve().then(() => console.log("Promise Outside")); console.log("Script End"); //5 async function foo() { console.log("Foo Start"); return "Foo End"; } async function bar() { console.log("Bar Start"); return foo(); } console.log("Script Start"); bar().then(console.log); console.log("Script End"); // 6 async function test() { console.log("Before Await"); await 42; console.log("After Await"); } console.log("Script Start"); test(); console.log("Script End"); // 7 setTimeout(() => { console.log("Timeout Start"); Promise.resolve() .then(() => console.log("Promise Inside Timeout")) .then(() => setTimeout(() => console.log("Recursive Timeout"), 0)); console.log("Timeout End"); }, 0); Promise.resolve().then(() => console.log("Promise Outside Timeout")); // 8 Promise.race([ new Promise((resolve) => setTimeout(() => resolve("Timeout 1"), 500)), new Promise((resolve) => setTimeout(() => resolve("Timeout 2"), 300)), Promise.resolve("Immediate Resolution"), ]).then(console.log); // 9 Promise.resolve("Step 1") .then((value) => { console.log(value); throw new Error("Error Occurred"); }) .catch((err) => { console.log(err.message); return "Step 2"; }) .finally(() => console.log("Finally Block")) .then((value) => console.log(value)); //10 async function test() { try { console.log("Start"); await Promise.reject("An Error"); console.log("End"); } catch (error) { console.log("Caught: " + error); } finally { console.log("Finally"); } } test(); console.log("Script End");
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