Как исправить Uncaught SyntaxError: Unexpected identifier?

var slides = ['<div id = "slide1">первый слайд<br><img src = "//picsum.photos/200/300"></div>', 
  '<div id = "  slide2 ">второй слайд<br><img src = "//picsum.photos/200/301"></div>', 
  '<div id = "  slide3 ">третий слайд<br><img src = "//picsum.photos/200/302"></div>' 
]; 
var currentSlide = 0; 
var numberOfSlides = slides.length - 1; 
window.onload = loader; 
 
function loader() { 
  changeImage(); 
} 
 
function changeImage() { 
  if (currentSlide > numberOfSlides) { 
    currentSlide = 0; 
  } 
  document.getElementById('slideshow').innerHTML = slides[currentSlide]; 
  currentSlide++; 
  setTimeout(changeImage, 1000); 
}

#slideshow { 
  position: absolute; 
  width: 800px; 
  height: 400px; 
  top: 100px; 
  left: 100px; 
  display: hidden; 
}

<div id='slideshow'></div>