JavaScript Console Methods

JavaScript Console Methods

JavaScript console Methods :

console.assert()

The console.assert() method writes a message to the console, but only if an expression evaluates to false.

console.assert(document.getElementById("demo")), "You have no element with ID 'demo'"); //Output //Assertion failed : You have no element with ID 'demo'

console.clear()

The console.clear() method clears the console. It will also write a message in the console: “Console was cleared”.

console.clear(); //Output // console was cleared

console.count()

Writes to the console the number of times that particular console.count() is called. You can add a label that will be included in the console view.

console.count("myLabel"); console.count("myLabel"); //Output // myLabel : 1 // myLabel : 2

console.error()

he console.error() method writes an error message to the console.The console is useful for testing purposes.

console.error("You made a mistake"); //Output // You made a mistake

console.group()

The console.group() method indicates the start of a message group.All messages will from now on be written inside this group.

console.log("Hello world"); console.group(); console.log("this time inside a group!"); //Output // Hello world! // console.group // this time inside a group!

console.groupCollapsed()

The console.groupCollapsed() method indicates the start of a collapsed message group. Click the expand button to open the message group.

console.groupCollapsed(); console.log("this time inside a group!"); //Output // console.groupCollapsed // this time inside a group!

console.groupEnd()

The console.groupEnd() method indicates the end of a message group.

console.log("Hello world"); console.group(); console.log("this time inside a group!"); console.groupEnd(); console.log("and we are back."); //Output // Hello world! // console.group // this time inside a group! // and we are back.

console.table()

The console.table() method writes a table in the console view. The first parameter is required, and must be either an object, or an array, containing data to fill the table.

console.table(["Audi", "Volvo", "Ford"]);
Javascript console.table()

console.info()

The console.info() method writes a message to the console.

console.info("I Like Coding"); // Output //I Like Coding

console.log()

The console.log() method writes a message to the console. The console is useful for testing purposes.

console.log("I Like Coding"); // Output //I Like Coding

console.time()

Use the console.time() method to start the timer. The console.timeEnd() method ends a timer, and writes the result in the console view.

console.time(); for(i=0; i < 100000; i++){ // some code } console.timeEnd(); // Output // default : 2.491943359375 ms

console.warn()

The console.warn() method writes a warning to the console.

console.warn("This is a warning!"); // Output // This is a warning!

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