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The escape_javascript method in ActionView escapes the apostrophe ' as backslash apostrophe \', which gives errors when parsing as JSON.
For example, the message “I’m here” is valid JSON when printed as:
{"message": "I'm here"}
But, <%= escape_javascript("I'm here") %> outputs "I\'m here", resulting in invalid JSON:
{"message": "I\'m here"}
Is there a patch to fix this, or an alternate way to escape strings when printing to JSON?
Just call .to_json on a string and it will be escaped properly e.g.