Methods
C
Instance Public methods
csp_meta_tag()

Returns a meta tag “csp-nonce” with the per-session nonce value for allowing inline <script> tags.

<head>
  <%= csp_meta_tag %>
</head>

This is used by the Rails UJS helper to create dynamically loaded inline <script> elements.

Source: show | on GitHub 

# File actionview/lib/action_view/helpers/csp_helper.rb, line 17
def csp_meta_tag
  if content_security_policy?
    tag("meta", name: "csp-nonce", content: content_security_policy_nonce)
  end
end