diff --git a/kifu/kifu-pwa/converter.css b/kifu/kifu-pwa/converter.css
new file mode 100644
index 0000000..401fef8
--- /dev/null
+++ b/kifu/kifu-pwa/converter.css
@@ -0,0 +1,38 @@
+html {
+ background: rgb(243, 243, 243);
+ font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
+ font-size: 15pt;
+}
+
+html, body {
+ height: 100%;
+ margin: 0;
+}
+
+body {
+ display: grid;
+ place-items: center;
+}
+
+#converter {
+ width: 15rem;
+ padding: 2rem;
+ border-radius: .5rem;
+ box-shadow: 0 0 2rem 0 #0001;
+ display: flex;
+ flex-direction: column;
+ align-items: center;
+}
+
+#converter input, #converter select {
+ font-family: inherit;
+ font-size: inherit;
+ margin-block-end: 1rem;
+ text-align: center;
+ width: 10rem;
+}
+
+#converter #output-temp {
+ font-size: 2rem;
+ font-weight: bold;
+}
diff --git a/kifu/kifu-pwa/converter.js b/kifu/kifu-pwa/converter.js
new file mode 100644
index 0000000..a28fa83
--- /dev/null
+++ b/kifu/kifu-pwa/converter.js
@@ -0,0 +1,42 @@
+const inputField = document.getElementById('input-temp');
+const fromUnitField = document.getElementById('input-unit');
+const toUnitField = document.getElementById('output-unit');
+const outputField = document.getElementById('output-temp');
+const form = document.getElementById('converter');
+
+function convertTemp(value, fromUnit, toUnit) {
+ if (fromUnit === 'c') {
+ if (toUnit === 'f') {
+ return value * 9 / 5 + 32;
+ } else if (toUnit === 'k') {
+ return value + 273.15;
+ }
+ return value
+ }
+ if (fromUnit === 'f') {
+ if (toUnit === 'c') {
+ return (value - 32) * 5 / 9;
+ } else if (toUnit === 'k') {
+ return (value + 459.67) * 5 / 9;
+ }
+ return value;
+ }
+ if (fromUnit === 'k') {
+ if (toUnit === 'c') {
+ return value - 273.15;
+ } else if (toUnit === 'f') {
+ return value * 9 / 5 - 459.67;
+ }
+ return value;
+ }
+ throw new Error('Invalid unit');
+}
+
+form.addEventListener('input', () => {
+ const inputTemp = parseFloat(inputField.value);
+ const fromUnit = fromUnitField.value;
+ const toUnit = toUnitField.value;
+
+ const outputTemp = convertTemp(inputTemp, fromUnit, toUnit);
+ outputField.value = (Math.round(outputTemp * 100) / 100) + ' ' + toUnit.toUpperCase();
+});
diff --git a/kifu/kifu-pwa/icon512.png b/kifu/kifu-pwa/icon512.png
new file mode 100644
index 0000000..3f46c9d
Binary files /dev/null and b/kifu/kifu-pwa/icon512.png differ
diff --git a/kifu/kifu-pwa/index.html b/kifu/kifu-pwa/index.html
new file mode 100644
index 0000000..57389ec
--- /dev/null
+++ b/kifu/kifu-pwa/index.html
@@ -0,0 +1,36 @@
+
+
+
+
+
+
+ Temperature converter
+
+
+ Temperature Converter
+
+
+
+
+
+
diff --git a/kifu/kifu-pwa/manifest.json b/kifu/kifu-pwa/manifest.json
new file mode 100644
index 0000000..6a4dec4
--- /dev/null
+++ b/kifu/kifu-pwa/manifest.json
@@ -0,0 +1,17 @@
+{
+ "lang": "en-us",
+ "name": "Temperature converter app",
+ "short_name": "Temperature converter",
+ "description": "A basic temperature converter application",
+ "start_url": "/",
+ "background_color": "#2f3d58",
+ "theme_color": "#2f3d58",
+ "orientation": "any",
+ "display": "standalone",
+ "icons": [
+ {
+ "src": "/icon512.png",
+ "sizes": "512x512"
+ }
+ ]
+}
diff --git a/kifu/kifu-pwa/sw.js b/kifu/kifu-pwa/sw.js
new file mode 100644
index 0000000..8d6f105
--- /dev/null
+++ b/kifu/kifu-pwa/sw.js
@@ -0,0 +1,29 @@
+const CACHE_NAME = 'temperature-converter-v1';
+
+self.addEventListener('install', event => {
+ event.waitUntil((async () => {
+ const cache = await caches.open(CACHE_NAME);
+ cache.addAll([
+ '/',
+ '/converter.js',
+ '/converter.css',
+ ]);
+ })());
+});
+
+self.addEventListener('fetch', event => {
+ event.respondWith((async () => {
+ const cache = await caches.open(CACHE_NAME);
+ const cachedResponse = await cache.match(event.request);
+ if (cachedResponse) {
+ return cachedResponse;
+ } else {
+ try {
+ const fetchResponse = await fetch(event.request);
+ cache.put(event.request, fetchResponse.clone());
+ return fetchResponse;
+ } catch (e) {
+ }
+ }
+ })());
+});
diff --git a/kifu/kifu-wasm/Cargo.toml b/kifu/kifu-wasm/Cargo.toml
new file mode 100644
index 0000000..33b339f
--- /dev/null
+++ b/kifu/kifu-wasm/Cargo.toml
@@ -0,0 +1,12 @@
+[package]
+name = "kifu-wasm"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[lib]
+crate-type = ["cdylib"]
+
+[dependencies]
+wasm-bindgen = "0.2"
diff --git a/kifu/kifu-wasm/src/lib.rs b/kifu/kifu-wasm/src/lib.rs
new file mode 100644
index 0000000..7d12d9a
--- /dev/null
+++ b/kifu/kifu-wasm/src/lib.rs
@@ -0,0 +1,14 @@
+pub fn add(left: usize, right: usize) -> usize {
+ left + right
+}
+
+#[cfg(test)]
+mod tests {
+ use super::*;
+
+ #[test]
+ fn it_works() {
+ let result = add(2, 2);
+ assert_eq!(result, 4);
+ }
+}