Useful JavaScript console.log() Tricks Which You Need To Know

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Inside this article we will see the concept i.e Useful JavaScript console.log() Tricks Which You Need to Know Example Tutorial. Article contains the classified information about some informational tricks to use console log of javascript.

The console. log() method outputs a message to the web console. The message may be a single string (with optional substitution values), or it may be any one or more JavaScript objects. Note: This feature is available in Web Workers.

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Perform Substitutions In console.log()

To work with perform substitutions using console.log(), you need to pass two parameters.

String Substitutions using console.log()

To substitute string, use %s

Example #1

console.log("Welcome To %s", "Online Web Tutor");

Example #2

console.log("Hi, %s To %s", "Welcome", "Online Web Tutor");

Integer Substitutions using console.log()

To substitute integer, use %d

Example

var employees = ["Sanjay","Siddharth","Dhananjay","Sanjay"];

console.log("Total Employees: %d", employees.length);

We hope this article helped you to learn Useful JavaScript console.log() Tricks Which You Need to Know Tutorial in a very detailed way.

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