修改element ui select 多选

 1 <el-form-item size="large" label="风险类型" prop="insTypeVal">
 2               <el-select 
 3                 v-model="riskTypes.riskTypeVal" 
 4                 @change="changeSelectRisktypes"
 5                 filterable 
 6                 multiple 
 7                 clearable
 8                 collapse-tags 
 9                 placeholder="请选择">
10                 <el-option
11                   v-for="(item) in riskTypes.options"
12                   :key="item.riskNo"
13                   :label="item.riskType"
14                   :value="item.riskNo">   
15                   <span style="float: left">
16                     <img src="@/assets/checkBox3.png" v-if="item.showimg === ‘show3‘">
17                     <img src="@/assets/checkBox2.png" v-if="item.showimg === ‘show2‘">
18                     <img src="@/assets/checkBox1.png" v-if="item.showimg === ‘show1‘">
19                   </span>
20                   <span style="float: right; color: #8492a6; font-size: 13px">{{ item.riskType }}</span>                 
21                 </el-option>
22               </el-select>
23             </el-form-item>

 1 //风险类型
 2       riskTypes: {
 3         // showimg: ‘show1‘,
 4         isIndeterminate: true,
 5         options: [
 6           { riskType: "全部", riskNo: "全部", showimg: "show1" },
 7           { riskType: "有效", riskNo: "1", showimg: "show1" },
 8           { riskType: "失效", riskNo: "0", showimg: "show1" },
 9           { riskType: "ke失效", riskNo: "-2", showimg: "show1" }
10         ],
11         selects: [],
12         oldOptions: [],
13         riskTypeVal: []
14       },

 1 //风险类型下拉选择
 2     changeSelectRisktypes(val) {
 3       console.info(val);
 4       let allValues = [];
 5       for (let item of this.riskTypes.options) {
 6         allValues.push(item.riskNo);
 7       }
 8       const oldVal =
 9         this.riskTypes.oldOptions.length === 0
10           ? []
11           : this.riskTypes.oldOptions[0];
12       if (val.length) {
13         if (val.includes("全部")) {
14           this.riskTypes.riskTypeVal = allValues;
15           this.riskTypes.options.forEach(item => (item.showimg = "show3"));
16         }
17         if (oldVal.includes("全部") && !val.includes("全部")) {
18           if (val.length === allValues.length - 1) {
19             this.riskTypes.riskTypeVal = [];
20             this.riskTypes.options.forEach(item => (item.showimg = "show1"));
21           } else {
22             this.riskTypes.options[0].showimg = "show2";
23             val.forEach(item => {
24               this.riskTypes.options[allValues.indexOf(item)].showimg = "show3";
25             });
26           }
27         }
28         if (oldVal.includes("全部") && val.includes("全部")) {
29           const index = val.indexOf("全部");
30           val.splice(index, 1); // 排除全选选项
31           this.riskTypes.riskTypeVal = val;
32           this.riskTypes.options.forEach(item => (item.showimg = "show1"));
33           this.riskTypes.options[0].showimg = "show2";
34           val.forEach(item => {
35             this.riskTypes.options[allValues.indexOf(item)].showimg = "show3";
36           });
37         }
38         if (!oldVal.includes("全部") && !val.includes("全部")) {
39           if (val.length === allValues.length - 1) {
40             this.riskTypes.riskTypeVal = ["全部"].concat(val);
41             this.riskTypes.options.forEach(item => (item.showimg = "show3"));
42           } else if (val.length === 0) {
43             this.riskTypes.options.forEach(item => (item.showimg = "show1"));
44           } else {
45             this.riskTypes.options.forEach(item => (item.showimg = "show1"));
46             this.riskTypes.options[0].showimg = "show2";
47             val.forEach(item => {
48               this.riskTypes.options[allValues.indexOf(item)].showimg = "show3";
49             });
50           }
51         }
52       } else {
53         this.riskTypes.options.forEach(item => (item.showimg = "show1"));
54       }
55       this.riskTypes.oldOptions[0] = this.riskTypes.riskTypeVal;
56       console.info(this.riskTypes.riskTypeVal);
57       console.info(this.riskTypes.options);
58     },