智慧宿舍系统小程序

wechat/miniprogram/node_modules/@vant/weapp/dist/count-down/index.js

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+import { VantComponent } from '../common/component';
+import { isSameSecond, parseFormat, parseTimeData } from './utils';
+function simpleTick(fn) {
+  return setTimeout(fn, 30);
+}
+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: parseTimeData(0),
+    formattedTime: '0',
+  },
+  destroyed() {
+    clearTimeout(this.tid);
+    this.tid = null;
+  },
+  methods: {
+    // 开始
+    start() {
+      if (this.counting) {
+        return;
+      }
+      this.counting = true;
+      this.endTime = Date.now() + this.remain;
+      this.tick();
+    },
+    // 暂停
+    pause() {
+      this.counting = false;
+      clearTimeout(this.tid);
+    },
+    // 重置
+    reset() {
+      this.pause();
+      this.remain = this.data.time;
+      this.setRemain(this.remain);
+      if (this.data.autoStart) {
+        this.start();
+      }
+    },
+    tick() {
+      if (this.data.millisecond) {
+        this.microTick();
+      } else {
+        this.macroTick();
+      }
+    },
+    microTick() {
+      this.tid = simpleTick(() => {
+        this.setRemain(this.getRemain());
+        if (this.remain !== 0) {
+          this.microTick();
+        }
+      });
+    },
+    macroTick() {
+      this.tid = simpleTick(() => {
+        const remain = this.getRemain();
+        if (!isSameSecond(remain, this.remain) || remain === 0) {
+          this.setRemain(remain);
+        }
+        if (this.remain !== 0) {
+          this.macroTick();
+        }
+      });
+    },
+    getRemain() {
+      return Math.max(this.endTime - Date.now(), 0);
+    },
+    setRemain(remain) {
+      this.remain = remain;
+      const timeData = parseTimeData(remain);
+      if (this.data.useSlot) {
+        this.$emit('change', timeData);
+      }
+      this.setData({
+        formattedTime: parseFormat(this.data.format, timeData),
+      });
+      if (remain === 0) {
+        this.pause();
+        this.$emit('finish');
+      }
+    },
+  },
+});