Node.js console.group() Method
The console. group() method is an inbuilt application programming interface of the console module which is used to print passed content in a grouped style. It indicates the start of a message group. To end this group we can use console. groupEnd() method.
Syntax:
console.group([label]);
Parameters: This method accepts only one parameter as mentioned above and described below:
- label: The label for the group which you are grouping on the console. This parameter is not mandatory, it’s optional and can be run console. group() method without passing label parameter.
Parameter Values:
- Type: String
- Required: Optional
Return Value: This method doesn’t return anything but group the content on the console with a label if provided otherwise simply without a label.
Below examples illustrate the use of console. group() method in Node.js.
Example 1:
index.js
// Node.js program to demonstrate the // console.group() method // This code example demonstrate the // method without parameter // Accessing console module const console = require( 'console' ); console.log( "w3wiki" ); console.log(); // Creating First Group console.group(); // Printing First Statement of Group console.log( "1st print from the first group" ); // Printing Second Statement of Group console.log( "2nd print from the first group" ); // Ending the group console.groupEnd(); console.log(); |
Run index.js file using below command:
node index.js
Console Output:
w3wiki 1st print from the first group 2nd print from the first group
Example 2:
index.js
// Node.js program to demonstrate the // console.group() method // This code example demonstrate the method // with parameter and nested groups // Accessing console module const console = require( 'console' ); console.log( "w3wiki " ); console.log( "==========================" ); console.log(); // Creating First group console.group( "This is the starting main group" ); console.log(); // Printing First statement of Group console.log( "1st group and not from any nested group" ); console.log(); // Creating nested group in First group console.group( "Starting of the 1st Nested group" ); // Printing 1st line of nested group console.log( "Hello Beginner for Beginner from " + "1st Main Nested group" ); // Printing 2nd line of nested group console.log( "Computer Science Portal(w3wiki)" + " from 1st Main Nested group" ); // Ending of the first nested group console.groupEnd(); console.log(); console.log(); // Creating second nested group console.group( "Starting of the 2nd Main Nested group" ); // Printing 1st line of second nested group console.log( "Hello from 2nd Main Nested group" ); // Printing 2nd line of second nested group console.log( "Hello from 2nd Main Nested group" ); // Ending of the second nested group console.groupEnd(); console.log(); // Printing last line of the group console.log( "Now Main group will end" ); console.log(); // Calling groupEnd() method (It is used to // end the group for more understanding // the group method) console.groupEnd(); // Printing from outside the Main group console.log( "This the Hello from w3wiki" + " from outside the Main Group" ); console.log(); console.log( "===========================" ); |
Console Output:
w3wiki ========================== This is the starting main group 1st group and not from any nested group Starting of the 1st Nested group Hello Beginner for Beginner from 1st Main Nested group Computer Science Portal(w3wiki) from 1st Main Nested group Starting of the 2nd Main Nested group Hello from 2nd Main Nested group Hello from 2nd Main Nested group Now Main group will end This the Hello from w3wiki from outside the Main Group ===========================
Reference: https://nodejs.org/api/console.html#console_console_group_label
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