2/12 vue-axios 中 onUploadProgress 实现 上传图片 动态进度条

 1  update(event) {
 2       let self = this;
 3       let file = event.target.files[0];
 4       let param = new FormData(); // 创建form对象
 5       param.append("file", file); // 通过append向form对象添加数据
 6       console.log(param.get("file")); // FormData私有类对象，访问不到，可以通过get判断值是否传进去
 7 
 8       this.axios
 9         .post("/demo/upload_test", param, {
10           // 给个请求头，让后端知道应该怎么处理数据
11           headers: {
12             "Content-Type": "multipart/form-data",
13           },
14           onUploadProgress: (progressEvent) => {
15             let processStatu =
16               (((progressEvent.loaded / progressEvent.total) * 100) | 0) ;
17             self.index = processStatu;
18           },
19         })
20         .then((response) => {
21           console.log(response.data);
22         });
23     },

  1 <template>
  2   <div class="reviews-container">
  3     <h2>图片上传</h2>
  4     <!-- 上传文件 -->
  5     <div class="upload-container">
  6       <div class="upload">
  7         <span> {{ msg }}</span>
  8         <input
  9           class="upload-input"
 10           name="file"
 11           type="file"
 12           accept="image/png,image/gif,image/jpeg"
 13           @change="update($event)"
 14         />
 15       </div>
 16     </div>
 17     <div class="review">
 18       <span class="icon-container">上传进度</span>
 19       <div class="progress">
 20         <div class="progress-done" :style="{ width: index + ‘%‘ }"></div>
 21       </div>
 22       <span class="percent">{{ index }}%</span>
 23     </div>
 24   </div>
 25 </template>
 26  
 27 <script>
 28 export default {
 29   name: "processBar",
 30   props: {
 31     userId: {
 32       type: String,
 33       validator(value) {
 34         //  判断String是否为空
 35         return value;
 36       },
 37       default: "",
 38     }
 39   },
 40   components: {},
 41   data() {
 42     return {
 43         index:0,
 44       msg: "选择图片",
 45     };
 46   },
 47   mounted() {},
 48   computed: {
 49   },
 50   methods: {
 51     update(event) {
 52       let self = this;
 53       let file = event.target.files[0];
 54       let param = new FormData(); // 创建form对象
 55       param.append("file", file); // 通过append向form对象添加数据
 56       console.log(param.get("file")); // FormData私有类对象，访问不到，可以通过get判断值是否传进去
 57 
 58       this.axios
 59         .post("/demo/upload_test", param, {
 60           // 给个请求头，让后端知道应该怎么处理数据
 61           headers: {
 62             "Content-Type": "multipart/form-data",
 63           },
 64           onUploadProgress: (progressEvent) => {
 65             let processStatu =
 66               (((progressEvent.loaded / progressEvent.total) * 100) | 0) ;
 67             self.index = processStatu;
 68           },
 69         })
 70         .then((response) => {
 71           console.log(response.data);
 72         });
 73     },
 74   },
 75 };
 76 </script>
 77  
 78 <style scoped>
 79 .review-title h2 {
 80   margin: 0 0 0;
 81 }
 82 .reviews-container {
 83   margin: 0 auto;
 84   display: block;
 85   width: 350px;
 86   background-color: #ffffff;
 87   border-radius: 5px;
 88   box-shadow: 0 3px 10px -5px rgba(0, 0, 0, 0.3);
 89   padding: 20px;
 90 }
 91 .upload-container {
 92   text-align: left;
 93   margin: 0 auto;
 94   display: block;
 95   width: 350px;
 96   height: 25px;
 97 }
 98 .upload {
 99   position: relative;
100   text-align: center;
101   display: inline-block;
102   width: 75px;
103   height: 25px;
104   overflow: hidden;
105 }
106 .upload span {
107   font-size: 12px;
108   color: #777;
109   width: 80px;
110   margin: auto 0;
111   left: -1px;
112 }
113 
114 .upload .upload-input {
115   position: absolute;
116   right: 0;
117   top: 0;
118   opacity: 0;
119   float: right;
120 }
121 .upload:hover,
122 .upload-input:hover {
123   cursor: pointer;
124   /* border: 1px solid #ddd; */
125   box-shadow: 0 3px 10px -5px rgba(0, 0, 0, 0.7);
126 }
127 .fileinput-button {
128   position: relative;
129   display: inline-block;
130   overflow: hidden;
131 }
132 
133 .review {
134   border: 1px solid transparent;
135   border-radius: 5px;
136   color: #777;
137   display: flex;
138   font-size: 12px;
139   align-items: center;
140   padding: 10px;
141   margin: 5px 0;
142 }
143 
144 .review:hover {
145   cursor: pointer;
146   /* border: 1px solid #ddd; */
147   box-shadow: 0 3px 10px -5px rgba(0, 0, 0, 0.7);
148 }
149 .icon-container {
150   width: 50px;
151 }
152 .progress {
153   background-color: rgba(100, 100, 100, 0.2);
154   border-radius: 5px;
155   position: relative;
156   margin: 0 10px;
157   height: 10px;
158   width: 200px;
159 }
160 
161 .progress-done {
162   background: linear-gradient(to left, rgb(242, 112, 156), rgb(255, 148, 114));
163   box-shadow: 0 3px 3px -5px rgb(242, 112, 156), 0 2px 5px rgb(242, 112, 156);
164   border-radius: 5px;
165   height: 10px;
166   width: 0;
167   transition: width  ease 0.1s;
168 }
169 </style>