Re: [PR] fix(Chart): Calculate chart height correctly [superset]

via GitHub Fri, 18 Jul 2025 09:23:45 -0700


korbit-ai[bot] commented on code in PR #34224:
URL: https://github.com/apache/superset/pull/34224#discussion_r2216438897



##########
superset-frontend/src/dashboard/components/gridComponents/Chart.jsx:
##########
@@ -213,11 +213,15 @@
 
   const getHeaderHeight = useCallback(() => {
     if (headerRef.current) {
-      const computedStyle = getComputedStyle(
+      const computedMarginBottom = getComputedStyle(
         headerRef.current,
       ).getPropertyValue('margin-bottom');
-      const marginBottom = parseInt(computedStyle, 10) || 0;
-      return headerRef.current.offsetHeight + marginBottom;
+      const marginBottom = parseInt(computedMarginBottom, 10) || 0;
+      const computedHeight = getComputedStyle(
+        headerRef.current,
+      ).getPropertyValue('height');
+      const height = parseInt(computedHeight, 10) || DEFAULT_HEADER_HEIGHT;

Review Comment:
   ### Invalid CSS Height Parsing <sub>![category 
Functionality](https://img.shields.io/badge/Functionality-0284c7)</sub>
   
   <details>
     <summary>Tell me more</summary>
   
   ###### What is the issue?
   The fallback to DEFAULT_HEADER_HEIGHT when parseInt fails could be incorrect 
if there's a valid non-pixel CSS height value (e.g., 'auto', '100%', 'inherit')
   
   
   ###### Why this matters
   This could lead to incorrect chart height calculations when header heights 
are specified using non-pixel units, potentially causing rendering issues or 
visual glitches.
   
   ###### Suggested change ∙ *Feature Preview*
   Replace with a more robust height calculation that considers non-pixel 
values:
   ```javascript
   const height = computedHeight === 'auto' || computedHeight.endsWith('%')
     ? headerRef.current.offsetHeight
     : parseInt(computedHeight, 10) || DEFAULT_HEADER_HEIGHT;
   ```
   
   
   ###### Provide feedback to improve future suggestions
   [![Nice 
Catch](https://img.shields.io/badge/👍%20Nice%20Catch-71BC78)](https://app.korbit.ai/feedback/aa91ff46-6083-4491-9416-b83dd1994b51/76087eaf-02a5-412e-8996-786b4adac4a0/upvote)
 
[![Incorrect](https://img.shields.io/badge/👎%20Incorrect-white)](https://app.korbit.ai/feedback/aa91ff46-6083-4491-9416-b83dd1994b51/76087eaf-02a5-412e-8996-786b4adac4a0?what_not_true=true)
  [![Not in 
Scope](https://img.shields.io/badge/👎%20Out%20of%20PR%20scope-white)](https://app.korbit.ai/feedback/aa91ff46-6083-4491-9416-b83dd1994b51/76087eaf-02a5-412e-8996-786b4adac4a0?what_out_of_scope=true)
 [![Not in coding 
standard](https://img.shields.io/badge/👎%20Not%20in%20our%20standards-white)](https://app.korbit.ai/feedback/aa91ff46-6083-4491-9416-b83dd1994b51/76087eaf-02a5-412e-8996-786b4adac4a0?what_not_in_standard=true)
 
[![Other](https://img.shields.io/badge/👎%20Other-white)](https://app.korbit.ai/feedback/aa91ff46-6083-4491-9416-b83dd1994b51/76087eaf-02a5-412e-8996-786b4adac4a0)
   </details>
   
   <sub>
   
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##########
superset-frontend/src/dashboard/components/gridComponents/Chart.jsx:
##########
@@ -213,11 +213,15 @@ const Chart = props => {
 
   const getHeaderHeight = useCallback(() => {
     if (headerRef.current) {
-      const computedStyle = getComputedStyle(
+      const computedMarginBottom = getComputedStyle(
         headerRef.current,
       ).getPropertyValue('margin-bottom');
-      const marginBottom = parseInt(computedStyle, 10) || 0;
-      return headerRef.current.offsetHeight + marginBottom;
+      const marginBottom = parseInt(computedMarginBottom, 10) || 0;
+      const computedHeight = getComputedStyle(
+        headerRef.current,
+      ).getPropertyValue('height');
+      const height = parseInt(computedHeight, 10) || DEFAULT_HEADER_HEIGHT;
+      return height + marginBottom;
     }
     return DEFAULT_HEADER_HEIGHT;
   }, [headerRef]);

Review Comment:
   ### Duplicated Style Computation Logic <sub>![category 
Design](https://img.shields.io/badge/Design-0d9488)</sub>
   
   <details>
     <summary>Tell me more</summary>
   
   ###### What is the issue?
   The getHeaderHeight function contains repeated calls to getComputedStyle 
which could be extracted into a reusable helper function.
   
   
   ###### Why this matters
   Having duplicate getComputedStyle logic makes the code less maintainable and 
violates the DRY principle. Future changes would need to be made in multiple 
places.
   
   ###### Suggested change ∙ *Feature Preview*
   Extract the getComputedStyle logic into a reusable helper function:
   ```javascript
   const getComputedStyleValue = (element, property) => {
     const value = getComputedStyle(element).getPropertyValue(property);
     return parseInt(value, 10) || 0;
   };
   
   const getHeaderHeight = useCallback(() => {
     if (headerRef.current) {
       const marginBottom = getComputedStyleValue(headerRef.current, 
'margin-bottom');
       const height = getComputedStyleValue(headerRef.current, 'height') || 
DEFAULT_HEADER_HEIGHT;
       return height + marginBottom;
     }
     return DEFAULT_HEADER_HEIGHT;
   }, [headerRef]);
   ```
   
   
   ###### Provide feedback to improve future suggestions
   [![Nice 
Catch](https://img.shields.io/badge/👍%20Nice%20Catch-71BC78)](https://app.korbit.ai/feedback/aa91ff46-6083-4491-9416-b83dd1994b51/20a06e0b-7f30-4c46-8d22-7e6614b646e9/upvote)
 
[![Incorrect](https://img.shields.io/badge/👎%20Incorrect-white)](https://app.korbit.ai/feedback/aa91ff46-6083-4491-9416-b83dd1994b51/20a06e0b-7f30-4c46-8d22-7e6614b646e9?what_not_true=true)
  [![Not in 
Scope](https://img.shields.io/badge/👎%20Out%20of%20PR%20scope-white)](https://app.korbit.ai/feedback/aa91ff46-6083-4491-9416-b83dd1994b51/20a06e0b-7f30-4c46-8d22-7e6614b646e9?what_out_of_scope=true)
 [![Not in coding 
standard](https://img.shields.io/badge/👎%20Not%20in%20our%20standards-white)](https://app.korbit.ai/feedback/aa91ff46-6083-4491-9416-b83dd1994b51/20a06e0b-7f30-4c46-8d22-7e6614b646e9?what_not_in_standard=true)
 
[![Other](https://img.shields.io/badge/👎%20Other-white)](https://app.korbit.ai/feedback/aa91ff46-6083-4491-9416-b83dd1994b51/20a06e0b-7f30-4c46-8d22-7e6614b646e9)
   </details>
   
   <sub>
   
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   </sub>
   
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Re: [PR] fix(Chart): Calculate chart height correctly [superset]

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