Charts · Gutenberg
Heat Map block for WordPress
Grid heat map where cell colour encodes value intensity — ideal for correlation matrices and activity charts.
Get Blockenberg
Free Gutenberg block in Blockenberg. The inspector controls and front-end behavior on this page come from this block’s source, not a shared stub.
What it actually does
Grid heat map where cell colour encodes value intensity — ideal for correlation matrices and activity charts.
Inspector panels on this block: Chart Settings, Layout, Row Labels, Column Labels, Cell Values. Those titles come from index.js, not from a shared template.
Heat Map has no render.php and no frontend.js. The saved Gutenberg HTML is what visitors see, plus Blockenberg layout/typography CSS.
Where to find it
Gutenberg inserter → Charts → search “Heat Map” (block name `blockenberg/heat-map` in block.json). Style it in the sidebar after insert.
How to use Heat Map block for WordPress
- Install Blockenberg. Install from WordPress.org and activate the plugin.
- Insert the block. Edit a page, click +, search for “Heat Map”, insert it. Category: Charts.
- Configure inspector controls that exist on this block. Open Chart Settings. Set “Chart Settings — Title”, “Show Title”, “Show Values”, “Show Legend”.
- Publish. Save the page. Output is the saved block HTML; typography/colors follow Blockenberg shared panels.
Inspector controls from this block’s code
| Control | What the code does |
|---|---|
| Chart Settings — Title | Text field in the inspector. block.json default: Correlation Matrix. Saved as `title`. |
| Show Title | On/off toggle in the inspector. On by default. Saved as `showTitle`. |
| Show Values | On/off toggle in the inspector. On by default. Saved as `showValues`. |
| Show Legend | On/off toggle in the inspector. On by default. Saved as `showLegend`. |
| Cell Size (px) | Numeric range control in the inspector. Range 20–120. block.json default: 56. Saved as `cellSize`. |
| Cell Gap (px) | Numeric range control in the inspector. Range 0–12. block.json default: 3. Saved as `cellGap`. |
| Row Label Width | Numeric range control in the inspector. Range 40–240. block.json default: 110. Saved as `padLeft`. |
| Column Header Height | Numeric range control in the inspector. Range 30–160. block.json default: 80. Saved as `padTop`. |
| Label Font Size | Numeric range control in the inspector. Range 8–20. block.json default: 12. Saved as `labelFontSize`. |
| Value Font Size | Numeric range control in the inspector. Range 7–18. block.json default: 11. Saved as `valueFontSize`. |
| Low value | Color control in the inspector. block.json default: #dbeafe. Saved as `colorLow`. |
| Mid value | Color control in the inspector. block.json default: #93c5fd. Saved as `colorMid`. |
| High value | Color control in the inspector. block.json default: #1d4ed8. Saved as `colorHigh`. |
| Colors — Background | Color control in the inspector. block.json default: #ffffff. Saved as `bgColor`. |
| Colors — Title | Color control in the inspector. block.json default: #111827. Saved as `titleColor`. |
| Labels/Text | Color control in the inspector. block.json default: #374151. Saved as `textColor`. |
| One label per line | Multiline text field in the inspector. Saved as `rowLabels`. |
| One label per line (Col Labels) | Multiline text field in the inspector. Saved as `colLabels`. |
| Values | Multiline text field in the inspector. Saved as `cellValues`. |
When this is the right block
- Grid heat map where cell colour encodes value intensity — ideal for correlation matrices and activity charts — that is the job of Heat Map, not a generic content block.
- Use it when you need the editor control labeled “Chart Settings — Title”, which exists on this block’s inspector.
- Inserter grouping: reports, dashboards, and data-heavy pages.
Notes from the implementation
Static block: markup is saved in post content; no PHP render callback in this folder.
FAQ
How do I add the Heat Map block in WordPress?
Install Blockenberg from WordPress.org, edit a page in the block editor, click +, and search for “Heat Map”. It sits under Charts. After insert, open Chart Settings and set “Chart Settings — Title”, “Show Title”, “Show Values”, “Show Legend”.
What makes Heat Map different from other Blockenberg blocks?
Grid heat map where cell colour encodes value intensity — ideal for correlation matrices and activity charts. Inspector labels on this block include “Chart Settings — Title”, “Show Title”, “Show Values”, “Show Legend”.
Is the Heat Map Gutenberg block free?
Yes. Heat Map ships inside Blockenberg. Get the plugin from WordPress.org — no paid add-on is required for this block.
Can I style Heat Map to match my theme?
Yes. Blockenberg’s shared typography and color panels apply here, plus any block-specific style controls listed on this page (panels: Chart Settings, Layout, Row Labels, Column Labels).
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Get Blockenberg
Install Blockenberg from WordPress.org, then insert Heat Map from the Gutenberg inserter.