Masterpage.js does not Accepting Id's

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1

Why is masterPage.js not accepted #ID , It should work for all pages. Am I right?

2

  1. You can’t put an import line in the middle of your code. It must be at the top.

  2. Are all these elements set to be Global (i.e. each appears on every page. Not a copy of each, but the exact element)?

  3. Are there pages without these elements?