To round off this chapter, let me introduce two web tools that can help you be aware about what features you can safely use and which will make a transpiler (such as Babel, which we mentioned at the start of this chapter) necessary.
Determining a feature's availability
How to do it...
Your first resource will be https://kangax.github.io/compat-table/, which provides very thorough and complete tables showing, feature by feature, what is supported on JS engines everywhere. Depending on your specific needs, you might be able to totally dispense with transpiling, but it's certain you should be careful before taking such a measure!
The following screenshot shows Kangax at work:
The Kangax website lets you determine...
