[CSS] overflow: auto의 side effect가 SVG element에 주는 영향 (feat. GPT-4)

My prompt

I discovered a funny (?) thing. When I wrap VISX line graphs inside a div with a TailwindCSS class w-full flex flex-col items-center justify-start overflow-auto, the VISX graph automatically adjusts to the size of browser width(window size), but if I just get rid of overflow-auto, the graph adjusts only after browser refreshes, and before refreshing, a horizontal scroll appears.

(번역: VISX 그래프를 div안에 넣었을 때, 그 div의 CSS class가 overflow: auto 속성이 있으면 window size에 responsive하게 resize 되는데, 이 속성을 제거하면 브라우저 새로고침을 해야 resize 되고, 그 전에는 가로 스크롤바가 생김)

ChatGPT

The behavior you're observing with the VISX line graphs in your React application is related to how CSS properties interact with SVG elements and how the browser renders these elements. Let's break down the impact of the TailwindCSS classes you've mentioned:

w-full: This sets the width of the container to be the full width of its parent. This part is straightforward.

너무 쉬운 거라서 번역 안 함

flex flex-col items-center justify-start: These classes establish a flex container with a vertical layout, centering items horizontally and aligning them to the start (top) of the container. This shouldn't directly affect the width of the line graphs.

요약: width resize 되는 현상과 무관함

overflow-auto: This is the critical part. When you set overflow-auto on a container, it will provide scrollbars if its contents exceed the container's dimensions. However, an interesting side effect is that it also triggers a re-calculation of the container's dimensions in certain rendering situations, especially when dealing with SVGs (like your VISX graphs).

요약: 이 속성이 중요하다! 이 속성의 side effect는 특정 상황에서 (특히 VISX 그래프와 같은 SVG를 다룰 때) 컨테이너의 dimension(너비, 높이 등)을 다시 계산하게 함.

Here's what's likely happening:

With overflow-auto, the browser is more actively checking and recalculating the dimensions of the container. This means that your VISX graph, being responsive, is able to adjust its size immediately to match the container's width as the window resizes.

Without overflow-auto, the container's size recalculation is not triggered as aggressively. As a result, your VISX graph doesn't resize immediately. The horizontal scrollbar appears because the graph initially overflows the container's width. Only after refreshing the page (which forces a re-calculation of layout and dimensions) does the graph adjust to the available width.

This behavior is a combination of how CSS overflow properties interact with the rendering engine and how SVG elements respond to container size changes. To make the graph adjust automatically without overflow-auto, you might need to implement a resize observer in your React component that explicitly triggers a re-render or adjustment of the graph when the container's dimensions change. This way, the graph will always be in sync with the container's width, even without relying on the side effects of specific CSS properties.

overflow-auto 속성 없이 알아서 container 너비에 맞게 dimension이 변화하길 원한다면 resize observer를 사용하라

나는 그냥 CSS 사이드이펙트 그대로 사용하고 싶지만 혹시 그렇지 않은 사람들이 있을 수 있으므로 추가적으로 질문했다.

My Prompt
Do you mean withParentSize from @visx/responsive?

ChatGPT
Yes, using withParentSize from @visx/responsive is a good approach for making your VISX graphs responsive to the parent container's size. This higher-order component (HOC) from VISX provides a way to automatically update your graph when the size of its parent container changes.

Here's a basic outline of how you can use withParentSize:

• Wrap Your Graph Component: You wrap your graph component with withParentSize. This HOC injects parentWidth and parentHeight props into your graph component.

• Use the Injected Props: In your graph component, you use these parentWidth and parentHeight props to dynamically set the size of your graph. This way, your graph's size is always in sync with its parent container.

• Responsive Rendering: With this setup, whenever the parent container's size changes (due to window resizing or other layout changes), withParentSize will automatically provide the updated dimensions to your graph component, triggering a re-render with the new size.

Here's an example snippet:

import { withParentSize } from '@visx/responsive';

const MyResponsiveGraph = withParentSize(({ parentWidth, parentHeight }) => {
  // Use parentWidth and parentHeight to set the size of your graph
  return (
    // Render your graph using parentWidth and parentHeight
  );
});

export default MyResponsiveGraph;

In this setup, you no longer need to rely on specific CSS tricks or behaviors to ensure your graph is responsive. The withParentSize HOC handles the responsiveness by keeping your graph in sync with the parent container's size. This approach can lead to more predictable and manageable responsive behavior for your visualizations.