BUG: The Autosuggest endpoint field in the settings accepts non-URL values

[burhandodhy]

Describe the bug

The Autosuggest endpoint field in the settings accepts non-URL values. When passing the value to JS, the plugin tries to escape the value, resulting in an empty string. Consequently, Autosuggest doesn't work and no error is thrown.

Steps to Reproduce

1. Go to ElasticPress -> Autosuggest settings
2. Enter invalid URL in the ENDPOINT URL

Screenshots, screen recording, code snippet

No response

Environment information

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WordPress and ElasticPress information

No response

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