this vs. $(this). Often in a function you'll want to… | by Anthony Gore | Vue.js Developers | Medium
GitHub - jongha/jquery-emailinput: jQuery-emailinput is email address input control for jQuery. This is jQuery plugin. This is required when creating an web mail service such as hotmail and gmail. It supports validation
jQuery | 要素やその親子要素からid・class名を取得するパターンまとめ | ONE NOTES