Async Await Fetch API and Error Handling
Continue your JavaScript Tutorial learning path with hands-on explanation, code practice, and quiz.
Course
JavaScript Tutorial
Estimated Time
8 min
Progress
22%
Track Position
16 / 73
Lesson Overview
Simple Explanation
async function Promise return karti hai aur await asynchronous result ko readable style me handle karta hai. fetch API se REST endpoints call karte hain. try/catch runtime errors handle karta hai.
Code Explanation
Network request fail bhi ho sakti hai, is liye status check aur catch important hai.
Output Description
Success par data log hoga, fail par error message show hoga.
Practice Exercise
User list API fetch karo aur first 3 names ul element me render karo.
Extra Explanation
Why This Matters
Async Await Fetch API and Error Handling is core to dynamic behavior. Strong fundamentals here help you build forms, API flows, and interactive UI with confidence.
Real-World Workflow
Complex features are usually split into small functions, then verified through focused logging and tiny test cases.
Common Mistakes to Avoid
Avoid uncontrolled globals, weak error handling, and ignored async states. Define clear input-output expectations for each function.
Example + Live Practice
<script>
async function loadTodo() {
try {
const res = await fetch("https://jsonplaceholder.typicode.com/todos/1");
if (!res.ok) throw new Error("HTTP " + res.status);
const data = await res.json();
console.log("Todo title:", data.title);
} catch (error) {
console.error("Fetch failed:", error.message);
}
}
loadTodo();
</script>Try It Yourself
Test Your Knowledge
Quiz Coming Soon
Quiz for this lesson is not added yet.
Save Your Work
Lesson ke end par apna code save karein. Dashboard me aap kabhi bhi is saved code ko dobara dekh sakte hain.