Issue Summary

For certain use cases of JavaScript, the syntax highlighting that is used when displaying the source of .js files is incorrect.

Steps to Reproduce

1. Have a .js file with the following content

   public something(callback: callback, options?: ConsumerOptions): Promise<Consumer> {
   	console.info(`[${this.constructor.name}] Consumer creating.`);
   
   	this.consumer = Consumer.create({
   		...options,
   		queueUrl: await this.getUrl(),
   		handleMessage: message => {
   			if (message.Body){
   				message.Body = JSON.parse(message.Body);
   			}
   		}
   	})
   }
   

2. View the file in source view

Expected Results

The syntax is highlighted consistently, something like this way:

Actual Results

The syntax is highlighted incorrectly:

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available