Макс

....
let obj = JSON.parse(xhr.response);
ul.innerHTML = '';
....

(params.projects || []).map(function(project) {
	return this.archiveProjectCart(project)
})

(params.projects || []).map(project => this.archiveProjectCart(project))


let html =  `
    <div class="archive-works__wrap">
      <p class="archive-works__year">${params.year}</p>
      <div class="archive-works__items">` + (params.projects || []).map(project => this.archiveProjectCart(project)) + 
      `</div>
    </div>
  `

.row {
  display: flex;
  justify-content: flex-end;
}

.row.row-start {
  justify-content: flex-start;
}

.row .box {
  flex-grow: 0;
  flex-shrink: 0;
  flex-basis: 25%;
  height: 200px;
  background: grey;
  text-align: center;
}

p {
 display: inline-block;
 border-bottom: 1px solid #000;
 position: relative;
 margin-left: 30px
}

p::before {
  content: '123';
  position: absolute;
  left: -30px
}

p {
 display: inline-block;
 border-bottom: 1px solid #000;
 margin-left: 30px;
}

p::before {
  content: '123';
  margin-left: -30px;
}