index.html

<!doctype html>
<html>

<head>
    <meta charset="utf-8">
    <script type="text/javascript" src="js/brython.js"></script>
    <script type="text/javascript" src="js/brython_stdlib.js"></script>
    <script src="https://github.com/tonsky/datascript/releases/download/0.18.10/datascript-0.18.10.min.js"></script>
</head>

<body onload="brython(1)">
<script type="text/python">
from browser import window, alert
datascript = window.datascript

from mercylog_datascript import DataScriptV1
datascript = window.datascript
m = DataScriptV1()

db = datascript.empty_db()
db1 = datascript.db_with(db, [[":db/add", 1, "name", "Ivan"],
                              [":db/add", 1, "age", 17]])
db2 = datascript.db_with(db1, [{":db/id": 2,
                                "name": "Igor",
                                "age": 35}])
N, A, E = m.variables('n', 'a', 'e')
query = m.query(find=[A], where=[[E, "name", "Igor"], [E, "age", A]])
q = query.code()
result = datascript.q(q, db2)
alert(result)


</script>
</body>

</html>