fix(question): 发布问题时增加重复提交拦截

src/main.js

@@ -5,6 +5,7 @@ import "./style/tsplus.less";
 import "github-markdown-css";
 import Vue from "vue";
 import "./util/rem";
+import "./util/prototype"; // 原型拓展
 
 import Modal from "./plugins/modal/";
 // import imgLazy from "./plugins/imgLazy";

src/page/post/PostQuestion.vue

@@ -133,6 +133,7 @@ export default {
   data() {
     return {
       step: 1,
+      loading: false,
 
       topics: [],
       questions: [],
@@ -297,6 +298,8 @@ export default {
       });
     },
     postQuestion(params) {
+      if (this.loading) return;
+      this.loading = true;
       // POST /questions
       this.$http
         .post(`/questions`, params, {
@@ -306,6 +309,9 @@ export default {
           this.$Message.success(message);
           this.$router.push(`/questions/${question.id}`);
           this.$lstore.removeData("H5_POST_QUESTION_DRAFT");
+        })
+        .finally(() => {
+          this.loading = false;
         });
     },
     cancel() {

src/util/prototype.js

@@ -0,0 +1,13 @@
+// 补充 ES6 新提案 Promise.prototype.finally 在 iOS 下不生效的问题
+if (typeof Promise.prototype.finally !== "function") {
+  Promise.prototype.finally = function(callback) {
+    let P = this.constructor;
+    return this.then(
+      value => P.resolve(callback()).then(() => value),
+      reason =>
+        P.resolve(callback()).then(() => {
+          throw reason;
+        })
+    );
+  };
+}