init (doc, win, iframe, click, enter, input)

The javaScript code to run only once with current main page or every iframe with doc:(document of main page or iframe). If you want to run some code only once, or you want to mirror your status on main page to iframe, try this.

Example:

"init": "if (iframe == null) return; await click('#btn'); await input('#input', 'here you are'); await enter('#input');"

While extracting content in iframe, first click '#btn', then input words 'here you are' to '#input', press 'enter' on '#input' at last.

This code will run only once, user this to finish work which you want to run one time