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

Log in to Qiita Team
Community
OrganizationEventAdvent CalendarQiitadon (β)
Service
Qiita JobsQiita ZineQiita Blog
10
Help us understand the problem. What are the problem?

More than 3 years have passed since last update.

@tsujiura

HTMLCollectionを配列に変換して使う(ES2015+)

document.getElementsByTagName('div');で取得したHTMLCollectionはそのままだとforEach,map,reduce,filter等の便利な関数は使えないので配列に変換する必要がありますが、ES2015だとすっきり書けます。

const div = document.getElementsByTagName('div');
[...div].forEach((item) => {
  // 処理
});
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
10
Help us understand the problem. What are the problem?