Why Isn't My CSS Grid Layout Rendering in IE11, Even with Prefixes?

CSS Grid Layout Not Rendering in IE11, Despite Prefixes

Understanding the Issue

In CSS Grid Layout, the usage of -ms prefixes is intended to ensure compatibility with Microsoft Edge and IE11. However, when this fails to render the grid in IE11, we delve into the underlying reasons.

IE11's Limited Grid Spec Implementation

The crux of the problem lies in IE11's adherence to an older version of the Grid specification. Consequently, several CSS properties used in the provided HTML and SCSS code are not recognized by IE11, even with the -ms prefixes.

Specific Challenges

1. repeat(): IE11 lacks support for the repeat() function in grid-template-columns and grid-template-rows. This requires using explicit column and row definitions instead.
2. span: The span keyword for grid-column-span and grid-row-span is not present in the older spec. IE11 requires using the equivalent properties grid-column-span and grid-row-span.
3. grid-gap: The grid-gap property and its long-hand forms are not supported in IE11. Alternative methods, such as margins, are necessary for spacing between grid items.
4. Grid Item Auto Placement: IE11 does not support automatic placement of grid items. To ensure proper placement, explicitly define -ms-grid-row and -ms-grid-column properties for each grid item.

Revised Code for IE11 Compatibility:

The provided code must be updated as follows to work in IE11:

    .grid {
      display: -ms-grid;
      -ms-grid-columns: 1fr 1fr 1fr 1fr;
      -ms-grid-rows: 270px 270px 270px 270px;
      grid-gap: 30px;
    }

    .grid .grid-item {
      -ms-grid-column: span 2;
      -ms-grid-row: span 2;
    }

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