Empty page (rendered = '') causes error

[uuf6429]

wordpress-importer/src/wp.js

Line 62 in 141c99d

} else if (typeof field_value === 'object' && field_value.rendered) {

If field.value.rendered is an empty string, that condition is skipped and an object is returned, causing the error below inside turndown:

Uncaught TypeError: [object Object] is not a string, or an element/document/fragment node.

A fix would be to check if rendered is actually undefined, eg:

    } else if (typeof field_value === 'object' && field_value.rendered !== undefined) {

Note that this might also apply to line 64 with href.

Edit: I tested the change locally and it seems to work.