TypeScript cleanup

scripts/Utils/canUseWebP.ts

@@ -0,0 +1,3 @@
+export function canUseWebP(): boolean {
+	return document.createElement("canvas").toDataURL("image/webp").indexOf("data:image/webp") === 0
+}

scripts/Utils/delay.ts

@@ -0,0 +1,3 @@
+export function delay<T>(millis: number, value?: T): Promise<T> {
+	return new Promise(resolve => setTimeout(() => resolve(value), millis))
+}

scripts/Utils/findAll.ts

@@ -0,0 +1,7 @@
+export function* findAll(className: string): IterableIterator<HTMLElement> {
+	let elements = document.getElementsByClassName(className)
+
+	for(let i = 0; i < elements.length; ++i) {
+		yield elements[i] as HTMLElement
+	}
+}

scripts/Utils/index.ts

@@ -0,0 +1,6 @@
+export * from "./canUseWebP"
+export * from "./delay"
+export * from "./findAll"
+export * from "./plural"
+export * from "./requestIdleCallback"
+export * from "./swapElements"

scripts/Utils/plural.ts

@@ -0,0 +1,3 @@
+export function plural(count: number, singular: string): string {
+	return (count === 1 || count === -1) ? (count + " " + singular) : (count + " " + singular + "s")
+}

scripts/Utils/requestIdleCallback.ts

@@ -0,0 +1,7 @@
+export function requestIdleCallback(func: Function) {
+	if("requestIdleCallback" in window) {
+		window["requestIdleCallback"](func)
+	} else {
+		func()
+	}
+}

scripts/Utils/swapElements.ts

@@ -0,0 +1,22 @@
+export function swapElements(a: Node, b: Node) {
+	let parent = b.parentNode
+	let bNext = b.nextSibling
+
+	// Special case for when a is the next sibling of b
+	if(bNext === a) {
+		// Just put a before b
+		parent.insertBefore(a, b)
+	} else {
+		// Insert b right before a
+		a.parentNode.insertBefore(b, a)
+
+		// Now insert a where b was
+		if(bNext) {
+			// If there was an element after b, then insert a right before that
+			parent.insertBefore(a, bNext)
+		} else {
+			// Otherwise just append it as the last child
+			parent.appendChild(a)
+		}
+	}
+}