How to properly use a library with an LGPL license?

Question

JavaScript

There is a datepicer plugin xdsoft.net/jqplugins/datetimepicker/, I'm making a website for a customer, tell me how to use the library correctly so as not to violate the license?

Answer 1

Well, first of all, why did you decide that this DateTimePicker of yours is under the terms of the GNU Lesser GPL? He, as is quite common in the jQuery environment, simply does not have a license . One can, of course, assume that the author wished to assign a "gapless" permissive Expat license to his work, based only on the fact that a copy of it is in the root of the code repository, but that's a pretty bold assumption.
Your question about the GNU LGPL, however, does not become invalid, just divorced from a specific case. Well, in general, it would be nice to read the GNU LGPL itself , as well as the GNU GPL , because the first, if we are talking about the current third version, is not independent - they are surprisingly clear for the contract.
But if you are interested in retelling a non- lawyer , then please:

• The bottom line is that you must ensure that all users can exercise the right to modify a free library, even if it is linked to your non-free product, for which you must:
  • Inform the recipients of your product that they have such a right: i.e., say that such and such a free library is included in your product under the terms of the GNU Lesser GPL and indicate a copyright notice and attach the full text of the GNU LGPL (including GNU GPL if v3).
    Something like this, it seems that he didn’t forget anything; in general, nothing complicated.

Answer 2

If you do not change the code of the library itself, then there will be no problems at all.