1 files changed, 43 insertions, 0 deletions
diff --git a/packages/instant/src/style/media.ts b/packages/instant/src/style/media.ts
new file mode 100644
index 000000000..beabbac46
--- /dev/null
+++ b/packages/instant/src/style/media.ts
@@ -0,0 +1,43 @@
+import { InterpolationValue } from 'styled-components';
+
+import { css } from './theme';
+
+export enum ScreenWidths {
+    Sm = 40,
+    Md = 52,
+    Lg = 64,
+}
+
+const generateMediaWrapper = (screenWidth: ScreenWidths) => (...args: any[]) => css`
+    @media (max-width: ${screenWidth}em) {
+        ${css.apply(css, args)};
+    }
+`;
+
+const media = {
+    small: generateMediaWrapper(ScreenWidths.Sm),
+    medium: generateMediaWrapper(ScreenWidths.Md),
+    large: generateMediaWrapper(ScreenWidths.Lg),
+};
+
+export interface ScreenSpecifications {
+    default: string;
+    sm?: string;
+    md?: string;
+    lg?: string;
+}
+export type MediaChoice = string | ScreenSpecifications;
+export const stylesForMedia = (cssPropertyName: string, choice: MediaChoice): InterpolationValue[] => {
+    if (typeof choice === 'string') {
+        return css`
+            ${cssPropertyName}: ${choice};
+        `;
+    }
+
+    return css`
+        ${cssPropertyName}: ${choice.default};
+        ${choice.lg && media.large`${cssPropertyName}: ${choice.lg}`}
+        ${choice.md && media.medium`${cssPropertyName}: ${choice.md}`}
+        ${choice.sm && media.small`${cssPropertyName}: ${choice.sm}`}
+    `;
+};