При нажатии на кнопку изменить текст

document.querySelector('#btn').onclick = function() { 
  if(this.innerHTML == "Hide response") 
  { 
    this.innerHTML = "View response"; 
    return; 
  } 
  else this.innerHTML = "Hide response"; 
}

<button type="button" class="btn btn-primary" data-toggle="collapse" id='btn' 
                                data-target="#view-report"> 
                            View response 
                        </button>

let show = true; 
function changeText(ev) { 
    if(show) { 
        ev.innerText = "Hide response" 
        show = false; 
    } 
    else { 
        ev.innerText = "View response" 
        show = true; 
    } 
}

<button type="button" class="btn btn-primary" onclick="changeText(this)" data-toggle="collapse" data-target="#view-report"> 
    View response 
</button>

function changeText(ev) { 
    if(ev.getAttribute('data-show') === "true") { 
        ev.innerText = "Hide response" 
        ev.setAttribute('data-show', "false");  
    } 
    else { 
        ev.innerText = "View response" 
        ev.setAttribute('data-show', "true");  
    } 
}

<button type="button" data-show="true" class="btn btn-primary" onclick="changeText(this)" data-toggle="collapse" data-target="#view-report"> 
    View response 
</button>