Removes property
from the JavaScript object.
This is the equivalent of the delete
operator in JavaScript.
void deleteProperty(property) { if (property is! String && property is! num) { throw new ArgumentError("property is not a String or num"); } JS('bool', 'delete #[#]', _jsObject, property); }
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https://api.dartlang.org/stable/2.0.0/dart-js/JsObject/deleteProperty.html