Why does my responsive CSS grid break after inserting dynamic HTML elements with JavaScript?

3 hours ago 1
ARTICLE AD BOX

I’m working on a front-end issue where my responsive CSS grid layout breaks only after I append dynamic content using JavaScript (fetch() + template cloning). The initial layout loads perfectly on all screen sizes, but once new items are injected into the grid, the elements stop aligning correctly and sometimes overflow outside the container.

I’ve checked for missing closing tags, confirmed that the dynamically added items use the same classes as the static ones, and even forced a layout reflow using offsetHeight. Still no luck. This problem happens on a project I’m building Interiors Land, but the issue is reproducible even in a simplified setup.

What are the common reasons a CSS Grid or Flexbox layout fails only after dynamic DOM manipulation, and how can I ensure the grid recalculates layout properly after content injection?

I can share a minimal reproducible snippet if needed.

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