{"version":"1.0","type":"rich","title":"the number of different case status along with time","description":"This visualization displays immigration case counts by status and year, with darker red cells indicating higher numbers. The heatmap uses a rectangular grid where each cell’s color intensity reflects the reported case volume for a specific status-year combination. Built with D3 and React, it leverages the vega-lite-api’s `markRect` encoding with color scale and tooltip functionality. Data comes from the Office of Foreign Labor Certification, and the code applies custom configuration for axis styling and tooltip presentation.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/b3520ce6b373400fa819398654be5b9c?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}