User:Deeday-UK/sandbox

{{Navbox

| name = Railway accidents and incidents {{{years|in {{{year}}}}}}

| bodyclass = plainlist

| bodystyle = white-space:nowrap;

| title = Railway accidents and incidents {{{years|in {{Start date|{{{year}}}}} }}}

| titleclass = hlist vevent

| list1 = {{div col|colwidth={{{listwidth|25em}}}}}

{{{list|}}}

{{div col end}}

| liststyle = text-align:left;

|below =

{{#if: {{{custom_prev_year|}}}

| Template:Railway accidents and incidents in {{{custom_prev_year

| {{#ifexist:Template:Railway accidents and incidents in {{#expr:{{{year}}}-1}}

| {{#expr:{{{year}}}-1}}   ◀ }}

}}   {{#if: {{{custom_next_year|}}}

| Template:Railway accidents and incidents in {{{custom_next_year

| {{#ifexist:Template:Railway accidents and incidents in {{#expr:{{{year}}}+1}}

| ▶   {{#expr:{{{year}}}+1}}}}

}}

}}{{#invoke:Check for unknown parameters|check|unknown=_VALUE_{{PAGENAME}}|checkpositional=y

|years|year|list|listwidth|custom_prev_year|custom_next_year

}}