Replace Switch

replaceSwitch.js

const getService = (type) => {

  const pres   = () => "ppt"
  const doc    = () => "doc"
  const sheet  = () => "sheet"
  const text   = () => "text"
  const pdf    = () => "pdf"
  const other  = () => "default"

  const service = {
    
    xls:   sheet,
    xlsx:  sheet,
    doc:   doc,
    docx:  doc,
    ppt:   pres,
    pptx:  pres,
    txt:   text,
    pdf:   pdf,
    other: other
  
  }
   
  return (service[type] || service["other"])()
}
console.log(getService("docx"))