vue中图片转base64格式实现方法

handleRemove(file, fileList) {
      console.log(file); 
      
      var reader = new FileReader();
      reader.readAsDataURL(file.raw); // 一定要传入file格式  
      reader.onload = () => {
        console.log("file 转 base64结果：" + reader.result);
      };
      reader.onerror = function(error) {
        console.log("Error: ", error);
      };
},

<!--  -->
<template>
  <div>
    <el-upload
      class="upload-demo"
      action="https://jsonplaceholder.typicode.com/posts/"
      :on-change="handleRemove"
      multiple
      :limit="3"
    >
      <el-button size="small" type="primary">点击上传</el-button>
    </el-upload>
  </div>
</template>

<script>
export default {
  name: "",
  data() {
    return {};
  },
  methods: {
    handleRemove(file, fileList) {
      console.log(file);
      var reader = new FileReader();
      reader.readAsDataURL(file.raw);
      reader.onload = () => {
        console.log("file 转 base64结果：" + reader.result);
      };
      reader.onerror = function(error) {
        console.log("Error: ", error);
      };
    },
  }
};
</script>
<style scoped>
/* @import url(); 引入css类 */
</style>