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
18
Help us understand the problem. What are the problem?

More than 5 years have passed since last update.

innerText(textContent)/innerHTMLを使わずJavaScriptでHTMLエスケープ

元になった記事

innerHTMLは"をエスケープしてくれるとは限らない
-- innerText(textContent)/innerHTMLを使ったHTMLエスケープは充分でないので今すぐやめろ、お前たちはもう終わりだ - TODESKING

String#replaceは引数にfunctionを渡せる

functionの第一引数はマッチした部分文字列そのものを保持するので、マッピングテーブルオブジェクトに渡して変換するこんな感じでどうだろう。なんかオシャレな気がするので。

function escapeHtml(content) {
  var TABLE_FOR_ESCAPE_HTML = {
    "&": "&",
    "\"": """,
    "<": "&lt;",
    ">": "&gt;"
  };
  return content.replace(/[&"<>]/g, function(match) {
    return TABLE_FOR_ESCAPE_HTML[match];
  });
}

ブラウザの対応状況とかは調べてないけど、たぶんモダンブラウザなら動くと思う。

参考

ruby/util.rb at trunk · ruby/ruby

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
18
Help us understand the problem. What are the problem?