init

dist/index.d.ts

@@ -1,2 +1 @@
-export { default as power } from "./sample";
-export { default as sqrt } from "./sample2";
+export { default as useCountdown } from './useCountdown';

dist/index.js

@@ -3,8 +3,6 @@ var __importDefault = (this && this.__importDefault) || function (mod) {
     return (mod && mod.__esModule) ? mod : { "default": mod };
 };
 Object.defineProperty(exports, "__esModule", { value: true });
-exports.sqrt = exports.power = void 0;
-var sample_1 = require("./sample");
-Object.defineProperty(exports, "power", { enumerable: true, get: function () { return __importDefault(sample_1).default; } });
-var sample2_1 = require("./sample2");
-Object.defineProperty(exports, "sqrt", { enumerable: true, get: function () { return __importDefault(sample2_1).default; } });
+exports.useCountdown = void 0;
+var useCountdown_1 = require("./useCountdown");
+Object.defineProperty(exports, "useCountdown", { enumerable: true, get: function () { return __importDefault(useCountdown_1).default; } });

dist/sample.d.ts

@@ -1,2 +0,0 @@
-declare const power: (n?: number | undefined) => number | undefined;
-export default power;

dist/sample.js

@@ -1,12 +0,0 @@
-"use strict";
-Object.defineProperty(exports, "__esModule", { value: true });
-var power = function (n) {
-    if (typeof n === "undefined" || n === null) {
-        return undefined;
-    }
-    if (typeof n !== "number") {
-        return undefined;
-    }
-    return Math.pow(n, 2);
-};
-exports.default = power;

dist/sample2.d.ts

@@ -1,2 +0,0 @@
-declare const sqrt: (n: number) => number | undefined;
-export default sqrt;

dist/sample2.js

@@ -1,12 +0,0 @@
-"use strict";
-Object.defineProperty(exports, "__esModule", { value: true });
-var sqrt = function (n) {
-    if (typeof n === "undefined" || n === null) {
-        return undefined;
-    }
-    if (typeof n !== "number") {
-        return undefined;
-    }
-    return Math.sqrt(n);
-};
-exports.default = sqrt;

dist/useCountdown.d.ts

@@ -0,0 +1,12 @@
+interface useCountdownOptions {
+    now?: () => Date;
+    onEnd?: () => void;
+    onCount?: (timeLeft: number) => void;
+    step?: number;
+}
+interface CountdownHookResult {
+    timeleft: number;
+    start: (timeLeft: number) => void;
+}
+declare function useCountdown(options?: useCountdownOptions): CountdownHookResult;
+export default useCountdown;

dist/useCountdown.js

@@ -0,0 +1,54 @@
+"use strict";
+var __assign = (this && this.__assign) || function () {
+    __assign = Object.assign || function(t) {
+        for (var s, i = 1, n = arguments.length; i < n; i++) {
+            s = arguments[i];
+            for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
+                t[p] = s[p];
+        }
+        return t;
+    };
+    return __assign.apply(this, arguments);
+};
+var __importDefault = (this && this.__importDefault) || function (mod) {
+    return (mod && mod.__esModule) ? mod : { "default": mod };
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+var react_1 = __importDefault(require("react"));
+var DEFAULT_OPTIONS = {
+    step: 1000
+};
+function useCountdown(options) {
+    var _a = react_1.default.useState(), timeleft = _a[0], setTimeleft = _a[1];
+    var _b = react_1.default.useState(), targetDatetime = _b[0], setTargetDatetime = _b[1];
+    var _c = __assign(__assign({}, DEFAULT_OPTIONS), options), step = _c.step, onCount = _c.onCount, onEnd = _c.onEnd;
+    var start = function (countAsM) {
+        setTimeleft(countAsM);
+    };
+    var varTimeout = null;
+    react_1.default.useEffect(function () {
+        return function () { return clearTimeout(varTimeout); };
+    }, []);
+    react_1.default.useEffect(function () {
+        if (timeleft === undefined) {
+            return;
+        }
+        var newTimeleft = timeleft - step;
+        if (newTimeleft < 0) {
+            setTimeleft(0);
+            onEnd === null || onEnd === void 0 ? void 0 : onEnd();
+        }
+        else {
+            onCount === null || onCount === void 0 ? void 0 : onCount(timeleft);
+            varTimeout = setTimeout(function () {
+                setTimeleft(newTimeleft);
+            }, step);
+        }
+    }, [timeleft]);
+    var result = {
+        timeleft: timeleft || 0,
+        start: start
+    };
+    return result;
+}
+exports.default = useCountdown;