Well for one you're missing a closing } in that function. But you could just do

  const showTable = ["email", "phone","website"]
    .reduce((previous, channel) => { return previous || !!institution[channel] &&    !/^\s*$/.test(institution[channel])
  }), false)

You can always just replace

  function() {

with

  () => {

and the only difference between the two would be binding this. Or you could do this:

  const showsTable = ["email", "phone", "website"]
    .reduce((previous, channel) => previous || !!institution[channel] && !/^\s*$/.test(institution[channel]), false)