1 files changed, 14 insertions, 0 deletions
diff --git a/node_modules/visibilityjs/index.d.ts b/node_modules/visibilityjs/index.d.ts
new file mode 100644
index 0000000000..4bb8d0297d
--- /dev/null
+++ b/node_modules/visibilityjs/index.d.ts
@@ -0,0 +1,14 @@
+declare module 'visibilityjs' {
+    export function every(interval: number, callback: Function): number;
+    export function every(interval: number, hiddenInterval: number, callback: Function): number;
+    export function onVisible(callback: Function): number|boolean;
+    export function afterPrerendering(callback: Function): number|boolean;
+    export function isSupported(): boolean;
+    export function state(): string;
+    export function hidden(): boolean;
+    export function unbind(id: number): void;
+    export function change(listener: VisiblityChangeListener): number|boolean;
+    export function stop(id: number): boolean;
+
+    type VisiblityChangeListener = (event: Event, state: string) => void;
+}