From b08845e49bd7267082e98ff834b6444d465391da Mon Sep 17 00:00:00 2001
From: Kagami Sascha Rosylight <saschanaz@outlook.com>
Date: Tue, 29 Jan 2019 10:56:25 +0900
Subject: [PATCH 1/2] partially revert Microsoft#625

---
 package.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package.json b/package.json
index dff6b56d3..cd97f9dde 100644
--- a/package.json
+++ b/package.json
@@ -3,7 +3,7 @@
   "private": true,
   "scripts": {
     "build": "tsc --p ./tsconfig.json && node ./lib/index.js",
-    "fetch-idl": "npm run build && node ./lib/idlfetcher.js",
+    "fetch-idl": "tsc --p ./tsconfig.json && node ./lib/idlfetcher.js",
     "fetch-mdn": "npm run build && node ./lib/mdnfetcher.js",
     "fetch": "echo This could take a few minutes... && npm run fetch-idl && npm run fetch-mdn",
     "baseline-accept": "cpx \"generated\\*\" baselines\\",

From ab48d385a8d35aa0e3d5d88dee65d9a5e82d2c43 Mon Sep 17 00:00:00 2001
From: Kagami Sascha Rosylight <saschanaz@outlook.com>
Date: Tue, 5 Feb 2019 13:14:22 +0900
Subject: [PATCH 2/2] update Intersection Observer types

---
 baselines/dom.generated.d.ts              |  7 ++--
 inputfiles/idl/Intersection Observer.widl | 40 +++++++++++++++++++++++
 inputfiles/idlSources.json                |  4 +++
 3 files changed, 48 insertions(+), 3 deletions(-)
 create mode 100644 inputfiles/idl/Intersection Observer.widl

diff --git a/baselines/dom.generated.d.ts b/baselines/dom.generated.d.ts
index 8fd89ce50..2b86364b1 100644
--- a/baselines/dom.generated.d.ts
+++ b/baselines/dom.generated.d.ts
@@ -535,9 +535,10 @@ interface IIRFilterOptions extends AudioNodeOptions {
 
 interface IntersectionObserverEntryInit {
     boundingClientRect: DOMRectInit;
+    intersectionRatio: number;
     intersectionRect: DOMRectInit;
     isIntersecting: boolean;
-    rootBounds: DOMRectInit;
+    rootBounds: DOMRectInit | null;
     target: Element;
     time: number;
 }
@@ -9396,7 +9397,7 @@ declare var ImageData: {
 interface IntersectionObserver {
     readonly root: Element | null;
     readonly rootMargin: string;
-    readonly thresholds: number[];
+    readonly thresholds: ReadonlyArray<number>;
     disconnect(): void;
     observe(target: Element): void;
     takeRecords(): IntersectionObserverEntry[];
@@ -9414,7 +9415,7 @@ interface IntersectionObserverEntry {
     readonly intersectionRatio: number;
     readonly intersectionRect: ClientRect | DOMRect;
     readonly isIntersecting: boolean;
-    readonly rootBounds: ClientRect | DOMRect;
+    readonly rootBounds: ClientRect | DOMRect | null;
     readonly target: Element;
     readonly time: number;
 }
diff --git a/inputfiles/idl/Intersection Observer.widl b/inputfiles/idl/Intersection Observer.widl
new file mode 100644
index 000000000..3b1e6018c
--- /dev/null
+++ b/inputfiles/idl/Intersection Observer.widl	
@@ -0,0 +1,40 @@
+callback IntersectionObserverCallback = void (sequence<IntersectionObserverEntry> entries, IntersectionObserver observer);
+
+[Constructor(IntersectionObserverCallback callback, optional IntersectionObserverInit options),
+ Exposed=Window]
+interface IntersectionObserver {
+  readonly attribute Element? root;
+  readonly attribute DOMString rootMargin;
+  readonly attribute FrozenArray<double> thresholds;
+  void observe(Element target);
+  void unobserve(Element target);
+  void disconnect();
+  sequence<IntersectionObserverEntry> takeRecords();
+};
+
+[Constructor(IntersectionObserverEntryInit intersectionObserverEntryInit)]
+interface IntersectionObserverEntry {
+  readonly attribute DOMHighResTimeStamp time;
+  readonly attribute DOMRectReadOnly? rootBounds;
+  readonly attribute DOMRectReadOnly boundingClientRect;
+  readonly attribute DOMRectReadOnly intersectionRect;
+  readonly attribute boolean isIntersecting;
+  readonly attribute double intersectionRatio;
+  readonly attribute Element target;
+};
+
+dictionary IntersectionObserverEntryInit {
+  required DOMHighResTimeStamp time;
+  required DOMRectInit? rootBounds;
+  required DOMRectInit boundingClientRect;
+  required DOMRectInit intersectionRect;
+  required boolean isIntersecting;
+  required double intersectionRatio;
+  required Element target;
+};
+
+dictionary IntersectionObserverInit {
+  Element?  root = null;
+  DOMString rootMargin = "0px";
+  (double or sequence<double>) threshold = 0;
+};
diff --git a/inputfiles/idlSources.json b/inputfiles/idlSources.json
index 7cbcf47ec..6e4f22a30 100644
--- a/inputfiles/idlSources.json
+++ b/inputfiles/idlSources.json
@@ -194,6 +194,10 @@
         "url": "https://www.w3.org/TR/IndexedDB-2/",
         "title": "Indexed Database"
     },
+    {
+        "url": "https://www.w3.org/TR/intersection-observer/",
+        "title": "Intersection Observer"
+    },
     {
         "url": "https://www.w3.org/TR/media-source/",
         "title": "Media Source Extensions"