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HTML DOM console.error() Method

The HTML DOM console.error() method is used for writing an error message to the console. This method is very useful for testing and debugging purposes.

Syntax

Following is the syntax for console.error() method −

console.error(console.error(message))

Here, message is a JavaScript string or an object. It is a required parameter value.

Example

Let us see an example for the HTML DOM console.error() method −

<!DOCTYPE html>
<html>
<body>
<h1>console.error() Method</h1>
<p>Click the below button to write object as error message on the console</p>
<button type="button" onclick="errMessage()">ERROR</button>
<script>
   function errMessage(){
      var errObj = { Message:"ERROR has been caused",Value:"NEGATIVE"};
      console.error(errObj);
   }
</script>
<p>Press F12 key to view the error message in the console </p>
</body>
</html>

Output

This will produce the following output −

On clicking the ERROR button and looking at the console tab in developer tools −

In the above example −

We have first created a button ERROR that will execute the errMessage() function when clicked by the user −

<button type="button" onclick="errMessage()">ERROR</button>

The errMessage() method creates a object with members Message and Value with their respective values. This object is then passed as a parameter to the error() method of the console object. The console.error() method will print the object on the console as an error message −

function errMessage(){
   var errObj = { Message:"ERROR has been caused",Value:"NEGATIVE"};
   console.error(errObj);
}
Updated on 08-Aug-2019 11:59:46

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