expo-font
Version:
Load fonts at runtime and use them in React Native components.
35 lines • 1.13 kB
JavaScript
import ExpoFontLoader from './ExpoFontLoader';
export const loadPromises = {};
// cache the value on the js side for fast access to the fonts that are loaded
let cache = {};
export function markLoaded(fontFamily) {
cache[fontFamily] = true;
}
export function isLoadedInCache(fontFamily) {
return fontFamily in cache;
}
export function isLoadedNative(fontFamily) {
if (isLoadedInCache(fontFamily)) {
return true;
}
else {
const loadedNativeFonts = ExpoFontLoader.getLoadedFonts();
// NOTE(brentvatne): Bail out here if there are no loaded fonts. This
// is functionally equivalent to the behavior below if the returned array
// is empty, but this handles improper mocking of `getLoadedFonts`.
if (!loadedNativeFonts?.length) {
return false;
}
loadedNativeFonts.forEach((font) => {
cache[font] = true;
});
return fontFamily in cache;
}
}
export function purgeFontFamilyFromCache(fontFamily) {
delete cache[fontFamily];
}
export function purgeCache() {
cache = {};
}
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