How to trim view field to height or number of lines? I have a div with a fixed height and want to display a view field.  When the content overflows the div, I'd like an elipsis to click for more.  

CSS can handle overflow and hide it (and overflow-text can handle a single line) but I have to estimate everyting for number of lines since words can be an arbitrary length.  Sure views with or without the smart trim module can handle words or characters, but I need to estimate the number of lines or, ideally, I'd like the trim based on the max-height of a div.

The Smart Trim maintainer suggested a CSS library which may help but does not solve the problem.

I imagine that views text overflow based on height is a common problem.
There is no way to handle this with Drupal modules, I suggest you use  Ellipsis in your Style( style the result rows items with Ellipsis .

You can read below help content :

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