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← DOM Manipulation with JavaScript
○The page is a tree○Exercise: follow the document reference○Load a script when the page is ready○Exercise: initialize a deferred script○Find one element by id or CSS selector○Exercise: select a notice and label○Compare DOM properties, HTML attributes, and node types○Exercise: inspect a room input and its nodes✦Module Quiz
○Find every match with querySelectorAll○Exercise: label every trail stop○Move from a child to its relatives○Exercise: trace a nested card○Check for missing elements and search within a card○Exercise: update only the chosen card○Compare a live HTMLCollection with a static NodeList○Exercise: safely expand a live collection✦Module Quiz
○Safe text and HTML○Exercise: render a safe notice○Read and change link attributes○Exercise: update an accessible link○Data attributes and conditional text○Exercise: announce session availability○Boolean attributes and DOM properties○Exercise: unlock a volunteer sign-up✦Module Quiz
○Add, remove, and check classes○Exercise: mark a favourite card○Toggle a panel accessibly○Exercise: toggle the help panel○Inline styles, classes, and hidden○Exercise: style and hide a notice○Change a CSS custom property from JavaScript○Exercise: change a workshop card accent✦Module Quiz
○Create and Append a Text Node○Exercise: Add a Reading List Item○Place Nodes Before and Between○Exercise: Order the Workshop Agenda○Remove, Replace, and Clear Safely○Exercise: Refresh a Museum Display○Clone a Card and Insert a Batch●Exercise: Clone Two Exhibit Cards✦Module Quiz
○Listen for Clicks with a Named Handler○Exercise: Check Library Hours○Event Target, Current Target, and Delegation○Exercise: Delegate Pantry Actions○Keyboard Events Without Trapping Keys○Exercise: Search the Recipe Box○Once, Remove, and Bubble○Exercise: Control Workshop Notifications✦Module Quiz
○Read a field while someone types○Build a live name preview○Handle submit without leaving the page○Validate a library request○Keep a selection in sync on change and reset○Sync a preference and its reset state○Read multiple checked values with FormData○Build a checkbox-based garden request✦Module Quiz
○Filter a list as someone types○Build a live trail finder○Toggle an accessible disclosure○Build a guide menu disclosure○Create and remove items with one delegated listener○Build a neighborhood task board○Sort a workshop table with accessible buttons○Build an accessible sortable resource table✦Module Quiz
○Read selectable cards and detail updates○Build directory cards and a selected profile○Trace live search and an empty state○Add live search to the community directory○Trace safe additions and delegated removal○Add and remove community directory cards✦Module Quiz
○Read and update a live itinerary○Build the workshop itinerary○Add a validated item through a form○Add a workshop session○Filter and remove live entries○Finish the workshop planner✦Module Quiz
○Fetch JSON and render safe text○Exercise: load recipe cards○Handle loading, empty, and failed responses○Exercise: handle alert states○Build a query with URLSearchParams○Exercise: search the catalog○Abort outdated requests○Exercise: keep the latest result✦Module Quiz
○Load a dashboard from an offline API fixture○Build an events dashboard○Query a dashboard with URLSearchParams○Add event search to the dashboard○Retry requests without stale results○Finish a resilient event dashboard✦Module Quiz

Exercise: Clone Two Exhibit Cards

The gallery has a single sample exhibit. Add two more exhibits using its nested layout, then place both copies in the list together.

How it works

The seed swap demo cloned Thyme into Basil and Mint. Here is another separate example from a concert set list: it changes each copied song title before adding the copies to a fragment. true matters because it preserves the nested title and note; each copied node must get its own title. Avoid adding IDs to copied cards, since duplicate IDs make selectors ambiguous.

javascript
// Different example: concert songs, not your gallery.
const queued = document.createDocumentFragment();
for (const song of ["Sunrise", "Lanterns"]) {
  const copy = firstSong.cloneNode(true);
  copy.querySelector(".song-title").textContent = song;
  queued.append(copy);
}
setList.append(queued);

Try the preview

The starter displays only Clay vessel. After the second step, run the preview: Clay vessel, Woven basket, and Glass bead should appear in that order, each with the original Collection item note. If a copy has no title span, make sure you passed true to cloneNode.

Remember

Earlier you changed text on a newly made element. On a deep clone, find the nested span inside that clone before inserting it; otherwise you may accidentally change the original card.

Your Task

  1. Complete makeExhibit(name) so it returns a detached deep clone of the sample with that name in its nested title, while keeping the sample and note unchanged.
  2. In addExhibits(), use a DocumentFragment to append the Woven basket and Glass bead clones together after Clay vessel.
Hint 1
1 / 1
HINT 1

Call original.cloneNode(true), then query the name within the copy, not within the original.

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