Mus­tache is a tem­plate engine, used in var­i­ous frame­works. It is “log­ic less”, it sup­ports if statemets, but it does not have many log­i­cal operations. Han­dle­bar is an exten­sion of Mus­tache with more capabilities. Read vari­ables: {{name}} With han­dle­bar, try to read a file: {{read "/etc/passwd"}} Or try to list a directory: {{#each (readdir "/etc")}} {{this}}{{/each}}