update

04-dom-events-async/04-click-counter/starter.js

@@ -4,3 +4,26 @@ let count = 0;
 // 1. 获取数字元素和 3 个按钮
 // 2. 点击按钮时更新 count
 // 3. 每次修改后，把最新 count 渲染到页面
+const num = document.getElementById("value")
+const del = document.getElementById("decrease-btn")
+const add = document.getElementById("increase-btn")
+const reset = document.getElementById("reset-btn")
+
+function ren() {
+  num.textContent = count
+}
+
+add.addEventListener("click", function () {
+  count++
+  ren()
+})
+
+del.addEventListener("click", function () {
+  count--
+  ren()
+})
+
+reset.addEventListener("click", function () {
+  count = 0
+  ren()
+})