hexo-theme-stellar/layout/_partial/widgets/search.ejs

<%
function layoutDiv() {
  var el = '<widget class="widget-wrapper search">'
  el += '<div class="widget-body">'
  el += '<div class="search-wrapper" id="search">'
  el += '<form class="search-form">'
  var filter = ''
  if (item.filter == 'auto') {
    if (page.layout == 'wiki') {
      let matches = page.path.match(/(.*?)\/(.*?)\//i)
      if (matches?.length > 0) {
        filter = matches[0]
      }
    }
  } else {
    if (item.filter?.length > 0) {
      filter = item.filter
    }
  }
  el += '<input type="text" class="search-input" id="search-input"'
  if (filter.length > 0) {
    if (!filter.startsWith('/')) {
      filter = '/' + filter
    }
    el += ' data-filter="' + filter + '"'
    el += ' placeholder="' + (item.placeholder || __('search.search_in', filter)) + '">'
  } else {
    el += ' placeholder="' + (item.placeholder || __('search.search')) + '">'
  }
  el += '</form>'
  el += '<div id="search-result"></div>'
  el += '<div class="search-no-result">' + __('search.no_results') + '</div>'
  el += '</div>'
  el += '</div>'
  el += '</widget>'
  return el
}
%>
<%- layoutDiv() %>