What is the difference between <%, <%=, <%# and -%> in ERB in Rails?

Question

Can some one please describe the usage of the following characters which is used in ERB file:

<%   %>
<%=  %>
<%  -%>
<%#  %>
         


        

Answer 1

I've added the <%% literal tag delimiter as an answer to this because of its obscurity. This will tell erb not to interpret the <% part of the tag which is necessary for js apps like displaying chart.js tooltips etc.

Update (Fixed broken link)

Everything about ERB can now be found here: https://puppet.com/docs/puppet/5.3/lang_template_erb.html#tags