[Shaisolaris]

Text nodes format JSON numbers with %v, which switches to exponent notation for many ordinary values (encoding/json only does that below 1e-6 or from 1e21 up):

doc, _ := jsonquery.Parse(strings.NewReader(`{"a":1000000,"b":123456789,"c":-0.000001}`))
jsonquery.FindOne(doc, "//a").InnerText() // "1e+06"
jsonquery.FindOne(doc, "//b").InnerText() // "1.23456789e+08"
doc.OutputXML() // ...<a>1e+06</a><b>1.23456789e+08</b><c>-1e-06</c>...

NodeNavigator.Value() already formats numbers with json.Marshal, so XPath sees 1000000 while InnerText(), OutputXML() and Node.Data show 1e+06.

This adds a small formatValue helper that formats float64 values with json.Marshal and leaves everything else as %v. It is used for text node Data, InnerText and OutputXML, so all three now match what XPath sees. Strings and booleans are unchanged.

Testing: TestLargeNumberText checks InnerText() for four numbers and checks OutputXML(). On master, three of the InnerText() checks and the OutputXML() check fail. With the change, go test . and go vet . pass. I only ran them on Go 1.25.