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To specify any of rules above use node types, described
in Esprima's source files (e.g. IfStatement, ForStatement or CallExpression) divided by space.
Structure rule gives you ability to check roughly structure of the program in the following way:
to specify structure, type appropriate node types divided by space in the order they are nested into each other.
For example, ForStatement IfStatement stands for «if statement inside the for loop». Example #4 shows visually how useful this could be.
Click sample buttons above the rules' inputs to see how it works with predefined samples.
Also please don't forget to take a look at README.md file in the repository, it contains
known issues, my personal thoughts and additional description regarding how to build/develop this package.