We have a JS button in Classic which perform some checks and open the /lead/leadconvert.jsp? page with some fields prepopulated.
Now we are migrating to Lightning, so for replacing the button we created quick action and redirecting the user to /lead/leadconvert.jsp?. But it is navigating to the classic page . Are there any events like force;createRecord which we can use for opening the Lead convert standard modal window.
Best Answer
Instead of going at it the way you've done, consider blocking it with a trigger:
You may also be able to use validation rules as well, since they now also run on lead conversion. I realize that this is slightly less ideal than aborting early, but using a trigger will prevent a lead from being converted incorrectly in any means, including Apex Code, Visualforce, Lightning, API, and Classic.