提交初始版本，使用vant ui库

miniprogram_npm/@vant/weapp/count-down/index.d.ts

@@ -0,0 +1 @@
+export {};

miniprogram_npm/@vant/weapp/count-down/index.js

@@ -0,0 +1,104 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+var component_1 = require("../common/component");
+var utils_1 = require("./utils");
+function simpleTick(fn) {
+    return setTimeout(fn, 30);
+}
+(0, component_1.VantComponent)({
+    props: {
+        useSlot: Boolean,
+        millisecond: Boolean,
+        time: {
+            type: Number,
+            observer: 'reset',
+        },
+        format: {
+            type: String,
+            value: 'HH:mm:ss',
+        },
+        autoStart: {
+            type: Boolean,
+            value: true,
+        },
+    },
+    data: {
+        timeData: (0, utils_1.parseTimeData)(0),
+        formattedTime: '0',
+    },
+    destroyed: function () {
+        clearTimeout(this.tid);
+        this.tid = null;
+    },
+    methods: {
+        // 开始
+        start: function () {
+            if (this.counting) {
+                return;
+            }
+            this.counting = true;
+            this.endTime = Date.now() + this.remain;
+            this.tick();
+        },
+        // 暂停
+        pause: function () {
+            this.counting = false;
+            clearTimeout(this.tid);
+        },
+        // 重置
+        reset: function () {
+            this.pause();
+            this.remain = this.data.time;
+            this.setRemain(this.remain);
+            if (this.data.autoStart) {
+                this.start();
+            }
+        },
+        tick: function () {
+            if (this.data.millisecond) {
+                this.microTick();
+            }
+            else {
+                this.macroTick();
+            }
+        },
+        microTick: function () {
+            var _this = this;
+            this.tid = simpleTick(function () {
+                _this.setRemain(_this.getRemain());
+                if (_this.remain !== 0) {
+                    _this.microTick();
+                }
+            });
+        },
+        macroTick: function () {
+            var _this = this;
+            this.tid = simpleTick(function () {
+                var remain = _this.getRemain();
+                if (!(0, utils_1.isSameSecond)(remain, _this.remain) || remain === 0) {
+                    _this.setRemain(remain);
+                }
+                if (_this.remain !== 0) {
+                    _this.macroTick();
+                }
+            });
+        },
+        getRemain: function () {
+            return Math.max(this.endTime - Date.now(), 0);
+        },
+        setRemain: function (remain) {
+            this.remain = remain;
+            var timeData = (0, utils_1.parseTimeData)(remain);
+            if (this.data.useSlot) {
+                this.$emit('change', timeData);
+            }
+            this.setData({
+                formattedTime: (0, utils_1.parseFormat)(this.data.format, timeData),
+            });
+            if (remain === 0) {
+                this.pause();
+                this.$emit('finish');
+            }
+        },
+    },
+});

miniprogram_npm/@vant/weapp/count-down/index.json

@@ -0,0 +1,3 @@
+{
+  "component": true
+}

miniprogram_npm/@vant/weapp/count-down/index.wxml

@@ -0,0 +1,4 @@
+<view class="van-count-down">
+  <slot wx:if="{{ useSlot }}"/>
+  <block wx:else>{{ formattedTime }}</block>
+</view>

miniprogram_npm/@vant/weapp/count-down/index.wxss

@@ -0,0 +1 @@
+@import '../common/index.wxss';.van-count-down{color:var(--count-down-text-color,#323233);font-size:var(--count-down-font-size,14px);line-height:var(--count-down-line-height,20px)}

miniprogram_npm/@vant/weapp/count-down/utils.d.ts

@@ -0,0 +1,10 @@
+export type TimeData = {
+    days: number;
+    hours: number;
+    minutes: number;
+    seconds: number;
+    milliseconds: number;
+};
+export declare function parseTimeData(time: number): TimeData;
+export declare function parseFormat(format: string, timeData: TimeData): string;
+export declare function isSameSecond(time1: number, time2: number): boolean;

miniprogram_npm/@vant/weapp/count-down/utils.js

@@ -0,0 +1,64 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.isSameSecond = exports.parseFormat = exports.parseTimeData = void 0;
+function padZero(num, targetLength) {
+    if (targetLength === void 0) { targetLength = 2; }
+    var str = num + '';
+    while (str.length < targetLength) {
+        str = '0' + str;
+    }
+    return str;
+}
+var SECOND = 1000;
+var MINUTE = 60 * SECOND;
+var HOUR = 60 * MINUTE;
+var DAY = 24 * HOUR;
+function parseTimeData(time) {
+    var days = Math.floor(time / DAY);
+    var hours = Math.floor((time % DAY) / HOUR);
+    var minutes = Math.floor((time % HOUR) / MINUTE);
+    var seconds = Math.floor((time % MINUTE) / SECOND);
+    var milliseconds = Math.floor(time % SECOND);
+    return {
+        days: days,
+        hours: hours,
+        minutes: minutes,
+        seconds: seconds,
+        milliseconds: milliseconds,
+    };
+}
+exports.parseTimeData = parseTimeData;
+function parseFormat(format, timeData) {
+    var days = timeData.days;
+    var hours = timeData.hours, minutes = timeData.minutes, seconds = timeData.seconds, milliseconds = timeData.milliseconds;
+    if (format.indexOf('DD') === -1) {
+        hours += days * 24;
+    }
+    else {
+        format = format.replace('DD', padZero(days));
+    }
+    if (format.indexOf('HH') === -1) {
+        minutes += hours * 60;
+    }
+    else {
+        format = format.replace('HH', padZero(hours));
+    }
+    if (format.indexOf('mm') === -1) {
+        seconds += minutes * 60;
+    }
+    else {
+        format = format.replace('mm', padZero(minutes));
+    }
+    if (format.indexOf('ss') === -1) {
+        milliseconds += seconds * 1000;
+    }
+    else {
+        format = format.replace('ss', padZero(seconds));
+    }
+    return format.replace('SSS', padZero(milliseconds, 3));
+}
+exports.parseFormat = parseFormat;
+function isSameSecond(time1, time2) {
+    return Math.floor(time1 / 1000) === Math.floor(time2 / 1000);
+}
+exports.isSameSecond = isSameSecond;