Qiita Teams that are logged in
You are not logged in to any team

Log in to Qiita Team
Community
OrganizationAdvent CalendarQiitadon (β)
Service
Qiita JobsQiita ZineQiita Blog
77
Help us understand the problem. What is going on with this article?
@komatzz

Vue.js で画像(ファイル)アップロード直後に表示させる方法

More than 3 years have passed since last update.

バージョン

Vue.js: 2.4.3

サンプル

https://jsfiddle.net/vtexxmh1/1/
vue_upload.gif

方法

v-on でチェンジイベントを取る

<div id="app">
  <h2>↓画像↓</h2>
  <img v-show="uploadedImage" :src="uploadedImage" />
  <input type="file" v-on:change="onFileChange">
</div>

取得したファイルをバインドする

new Vue({
  el: '#app',
  data() {
    return {
      uploadedImage: '',
    };
  },
  methods: {
    onFileChange(e) {
      let files = e.target.files || e.dataTransfer.files;
      this.createImage(files[0]);
    },
    // アップロードした画像を表示
    createImage(file) {
      let reader = new FileReader();
      reader.onload = (e) => {
        this.uploadedImage = e.target.result;
      };
      reader.readAsDataURL(file);
    },
  },  
})
77
Help us understand the problem. What is going on with this article?
Why not register and get more from Qiita?
  1. We will deliver articles that match you
    By following users and tags, you can catch up information on technical fields that you are interested in as a whole
  2. you can read useful information later efficiently
    By "stocking" the articles you like, you can search right away
komatzz
こんにちは。

Comments

No comments
Sign up for free and join this conversation.
Sign Up
If you already have a Qiita account Login
77
Help us understand the problem. What is going on with this article?