下拉框支持分页加载

jsowell-ui/src/main.js

@@ -84,3 +84,15 @@ new Vue({
   store,
   render: h => h(App)
 })
+
+Vue.directive('selectLoadMore', {
+  bind (el, binding) {
+    // 获取element-ui定义好的scroll盒子
+    const selectDom = el.querySelector('.el-select-dropdown .el-select-dropdown__wrap')
+    selectDom .addEventListener('scroll', function () {
+      if (this.scrollHeight - this.scrollTop < this.clientHeight + 1) {
+        binding.value()
+      }
+    })
+  }
+})