1 files changed, 49 insertions, 0 deletions
diff --git a/app/assets/javascripts/vue_shared/components/gl_countdown.vue b/app/assets/javascripts/vue_shared/components/gl_countdown.vue
new file mode 100644
index 00000000000..9327a2a4a6c
--- /dev/null
+++ b/app/assets/javascripts/vue_shared/components/gl_countdown.vue
@@ -0,0 +1,49 @@
+<script>
+import { calculateRemainingMilliseconds, formatTime } from '~/lib/utils/datetime_utility';
+
+/**
+ * Counts down to a given end date.
+ */
+export default {
+  props: {
+    endDateString: {
+      type: String,
+      required: true,
+      validator(value) {
+        return !Number.isNaN(new Date(value).getTime());
+      },
+    },
+  },
+
+  data() {
+    return {
+      remainingTime: formatTime(0),
+      countdownUpdateIntervalId: null,
+    };
+  },
+
+  mounted() {
+    const updateRemainingTime = () => {
+      const remainingMilliseconds = calculateRemainingMilliseconds(this.endDateString);
+      this.remainingTime = formatTime(remainingMilliseconds);
+    };
+
+    updateRemainingTime();
+    this.countdownUpdateIntervalId = window.setInterval(updateRemainingTime, 1000);
+  },
+
+  beforeDestroy() {
+    window.clearInterval(this.countdownUpdateIntervalId);
+  },
+};
+</script>
+
+<template>
+  <time
+    v-gl-tooltip
+    :datetime="endDateString"
+    :title="endDateString"
+  >
+    {{ remainingTime }}
+  </time>
+</template>