Styling Headers

Style grid header cells and column groups.

The grid exposes many CSS variables starting --ag-header-* for customizing header appearance, and when these are not
enough you can use CSS classes, in particular ag-header, ag-header-cell, and <code>
ag‑header‑group‑cell<code>:

.ag-theme-alpine {
    --ag-header-height: 30px;
    --ag-header-foreground-color: white;
    --ag-header-background-color: black;
    --ag-header-cell-hover-background-color: rgb(80, 40, 140);
    --ag-header-cell-moving-background-color: rgb(80, 40, 140);
}

.ag-theme-alpine .ag-header {
    font-family: cursive;
}

.ag-theme-alpine .ag-header-group-cell {
    font-weight: normal;
    font-size: 22px;
}

.ag-theme-alpine .ag-header-cell {
    font-size: 18px;
}

The above code would apply to every grid with the ag-theme-alpine. In this example, we also add a .headers1 class so
that it will only apply to this example.

Header Column Separators and Resize Handles

Header Column Separators appear between every column, whereas Resize Handles only appear on resizeable columns (Group 1
in the example below).

ag-theme-alpine {
    --ag-header-column-separator-display: block;
    --ag-header-column-separator-height: 100%;
    --ag-header-column-separator-width: 2px;
    --ag-header-column-separator-color: purple;

    --ag-header-column-resize-handle-display: block;
    --ag-header-column-resize-handle-height: 25%;
    --ag-header-column-resize-handle-width: 5px;
    --ag-header-column-resize-handle-color: orange;
}

The above code would apply to every grid with the ag-theme-alpine. In this example, we also add a .headers2 class so
that it will only apply to this example.

Style Header on Filter

Each time a Column Filter is applied to a column, the CSS
class ag-header-cell-filtered is added to the header. This can be used for adding style to headers that are filtered.

The example below adds some styling to ag-header-cell-filtered, so when you filter a column you will notice the column
header change.

.ag-header-cell-filtered {
    background-color: #1b6d85 !important;
    color: #fff !important;
}

.ag-header-cell-filtered span {
    color: #fff !important;
}

The above code would apply to every grid with the ag-theme-alpine. In this example, we also add
a <code>.header‑style‑on‑filter<code> class so that it will only apply to this example.

Full List of Header Variables