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Unique ID for DOM in Rails

October 14, 2020

Rails has many great view helpers, one of which is dom_id:

dom_id(Post.find(12))       <em># => "post_23"</em>
dom_id(Post.new)            <em># => "new_post"
language-rails</em>

You can also provide a prefix:

dom_id(Post.find(23), :edit) <em># => "edit_post_23"</em>
dom_id(Post.new, :custom)    <em># => "custom_post"
language-rails</em>

Official Rails doc

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