Console object in JS
The console object in JavaScript is widely used for debugging and logging information to the browser's console. It provides several useful functions. Here are some of the most important ones:
Commonly Used console Methods:
Example:-
// 1. console.log() - Prints a general message to the console
console.log("Hello, World!");
// 2. console.warn() - Displays a warning message in the console
console.warn("This is a warning!");
// 3. console.error() - Displays an error message in the console
console.error("This is an error message!");
// 4. console.table() - Displays an array or object data in a table format
let users = [
{ id: 1, name: "John" },
{ id: 2, name: "Jane" },
];
console.table(users); // Logs users in a tabular format
// 5. console.group() - Starts a collapsible group in the console
console.group("User Details");
console.log("Name: John"); // Nested log inside the group
console.log("Age: 30");
console.groupEnd(); // Ends the group
// 6. console.time() - Starts a timer with a label for performance tracking
console.time("LoopTime");
for (let i = 0; i < 100000; i++) {} // Simple loop for testing execution time
console.timeEnd("LoopTime"); // Ends the timer and logs the time taken
// 7. console.assert() - Logs a message if the condition is false
console.assert(5 > 10, "Condition failed!"); // Assertion fails, so message is logged
// 8. console.count() - Logs the number of times this label has been called
console.count("Button Clicked"); // Output: Button Clicked: 1
console.count("Button Clicked"); // Output: Button Clicked: 2