To configure a dynamic full-text search based on a query string, set the ftSearchText key to null, and for the ftSearchTextQSField key specify a query string field to hold the search text. For example:
“ftSearchText”: null,
“ftSearchTextQSField”: “search”
Then, include the created field in the query string appended to the URL, and set its value to the text to search for. Following the previous example, a URL with the following query string could be used to perform a full-text search for the word "budget":
?search=budget
For more information on query strings, see Using Query Strings.