Beyond console.log: 8 Powerful Console Methods
Tags: javascript, webdev, beginners, tutorial
Published: 2023-04-16 08:00:00

> Also available on my [blog](https://nikolasbarwicki.com/articles/beyond-console-log-8-powerful-console-methods)

As a frontend developer, you're probably familiar with the `console.log()` method. But did you know that there are many other console methods that can make your life easier when it comes to debugging and analyzing your code? In this article, we'll explore nine essential console methods that every frontend developer should know.

## 1. console.assert

The `console.assert()` method logs a message to the console and throws an error if the assertion is false. This method is useful for checking whether a condition is true and handling it accordingly. Here is an example:

```javascript
const x = 5
console.assert(x === 10, 'x should be 10')
```

![console.assert code example](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/gmk530etr7zmm27x887m.png)

```javascript
const x = 10
console.assert(x === 10, 'x should be 10')
```

![console.assert code example](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/ks63vywazbh7wy4hnmtg.png)

## 2. console.count

The `console.count()` method logs the number of times a particular piece of code is executed. This method is useful for measuring the time taken by a specific code block, function, or loop.


```javascript
function myFunction() {
  console.count('myFunction has been called')
}
myFunction()
myFunction()
```

![console.count code example](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/k3qbav16gl8mfy56aujw.png)

## 3. console.error

The `console.error()` method logs an error message to the console. This can be useful for identifying and fixing errors in your code.

```javascript
console.error('An error occurred!')
```

![console.error code example](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/d5ymm2klu9yol1c42s7t.png)

## 4. console.trace

The `console.trace()` method logs a stack trace to the console. This can be useful for tracing the flow of your code and identifying where errors are occurring.

```javascript
function firstFunction() {
  secondFunction()
}

function secondFunction() {
  console.trace('Trace')
}

firstFunction()
```

![console.trace code example](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/kcnsi9wkho8mlc0eg7dk.png)

## 5. console.table

The `console.table()` method logs a table of data to the console. This can be useful for analyzing and visualizing data in your code.

```javascript
const myData = [
  { name: 'John', age: 25 },
  { name: 'Jane', age: 30 },
  { name: 'Bob', age: 35 },
]
console.table(myData)
```

![console.table code example](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/z0ds2xqudpfksu2bty4z.png)

## 6. Grouping related log messages:

Sometimes, you may want to group related log messages together to make them easier to read. The Console Object provides three methods for grouping log messages together:

### console.group

The `console.group()` method creates a new log group in the console. All subsequent log messages will be grouped together until `console.groupEnd()` is called. Here is an example:

```javascript
console.group('Group 1')
console.log('Message 1')
console.log('Message 2')
console.groupEnd()
```

![console.group code example](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/38i8w4mkdq5kp57861il.png)

### console.groupCollapsed

The `console.groupCollapsed()` method creates a new collapsed log group in the console. The log messages in the group will be collapsed by default, and can be expanded by clicking on the group. Here is an example:

```javascript
console.groupCollapsed('Group 2')
console.log('Message 1')
console.log('Message 2')
console.groupEnd()
```

![console.groupCollapsed code example](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/69gdhjv0j6ydttir0hd6.png)

### console.groupEnd
The `console.groupEnd()` method ends the current log group created
by `console.group()` or `console.groupCollapsed()`. Here is an example:

```javascript
console.group('Group 1')
console.log('Message 1')
console.groupEnd()

console.groupCollapsed('Group 2')
console.log('Message 1')
console.groupEnd()
```

![console.groupEnd code example](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/c2chms6flzvot3xli3kl.png)

## 7. Time related log messages:

### console.time

The `console.time()` method starts a new timer. The timer is identified by a unique label that you provide as an argument to the method. You can start multiple timers with different labels, but make sure that each label is unique. Here is an example:

```javascript
console.time('Timer 1')
// Some time-consuming operation
console.timeEnd('Timer 1')
```

![console.time code example](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/4fep147m1qhgya1hpwfq.png)

### console.timeLog
The `console.timeLog()` method logs the elapsed time to the console
for the timer with the specified label. This method is useful for logging the elapsed
time at different points in your code. Here is an example:

```javascript
console.time('Timer 1')
// Some time-consuming operation
console.timeLog('Timer 1') // logs the elapsed time since the timer was started
// Some more time-consuming operation
console.timeLog('Timer 1') // logs the elapsed time since the last call to console.timeLog() for this timer
console.timeEnd('Timer 1')
```

![console.timeLog code example](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/w7ey1msqzyhcp71tyhn3.png)

### console.timeStamp
The `console.timeStamp()` method adds a timestamp to the console
log. This method is useful for tracking the timing of events in your code. Here is
an example:

```javascript
console.timeStamp('Event A started')
// Some time-consuming operation for event A
console.timeStamp('Event A ended')

console.timeStamp('Event B started')
// Some time-consuming operation for event B
console.timeStamp('Event B ended')
```

### console.timeEnd

The `console.timeEnd()` method stops the timer with the specified label and logs the elapsed time to the console. If the label does not match any existing timer, the method will do nothing. Here is an example:

```javascript
console.time('Timer 1')
console.timeEnd('Timer 1')
```

![console.timeEnd code example](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/u1e3lmhcido39sodz3b2.png)

Using these time-related methods can help you optimize the performance of your code
by identifying the parts of your code that take the longest to execute.

## 8. console.clear

The `console.clear()` method clears the console of all previous log messages. This can be useful for clearing the console and focusing on new log messages.

```javascript
console.clear()
```

![console.clear code example](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/vxt36yr7k2dx7tjlgl0i.png)


## Conclusion

By using these console methods effectively, we can debug and optimize our JavaScript code more efficiently. Happy coding!