lightbox-data.js

// For each image in the dataset, output this object:
// { src: "picture-3.jpg", caption: "Lorem Ipsum Dolor 2<br>Ut enim ad minim veniam, quis nostrud exercitation ullamco<br>2017" }

const data = [
	{
		"title": "Lorem Ipsum Dolor 1",
		"description": "Ut enim ad minim veniam, quis nostrud exercitation ullamco.",
		"year": "2018",
		"images": [
			"picture-1.jpg",
			"picture-2.jpg"
		]
	},
	{
		"title": "Lorem Ipsum Dolor 2",
		"description": "Ut enim ad minim veniam, quis nostrud exercitation ullamco",
		"year": "2017",
		"images": ["picture-3.jpg"]
	},
]

const works = []

data.forEach(work => {
  works.push(work.images.map(image => {
    return {
      "src": image,
      "caption": `${work.title}<br>${work.description}<br>${work.year}`
    }
  }))
});

const flattenedWorks = [].concat.apply([], works);