JavaScript comments to explain code and prevent execution of code

Comments in JavaScript can be used to explain JavaScript code or to prevent execution of lines.

Single line comments

The following example shows you how to use single line comments by using the ‘//’.

async payload => {
  // Check the channel of the user
  let channel = payload.channelName
}

Multi line comments

To place multi line comments you can use the ‘/*’ to open the comment section and ‘*/’ to close.

async payload => {

  /*
  Check the channel of the user
  Now we can change the flows based on the channel
  */

  let channel = payload.channelName
}

Prevent execution of lines

To prevent execution of lines you can use both of prior methods and is great for testing.

async payload => {

  // Check the channel of the user
  let channel = payload.channelName
  
  if(channel === 'messenger'){
    trigger('Channel-Messenger')
  }
  /*
  if(channel === 'socket'){
    trigger('Channel-Socket')
  }
  */
}