Date data input separator "." is not longer parsed correctly. Bug appeared some time ago. I first nottied it on pl.wikipedia.org (1 -2 weeks ago), now it's also on en.wikipedia.org, Mediawiki and Vega 2 editor. When graph is generated by Graphoid date is parsed correctly and graph is generated as expected, please see my sandbox.
Existing output
debug from Vega 2 editor shows that d3 parse of input is null
Expected output
Vega 2 JSON for example above
{
"width": 200,
"height": 200,
"scales": [
{
"type": "time",
"name": "x",
"domain": {"data": "chart","field": "x"},
"range": "width",
"zero": false
},
{
"type": "linear",
"name": "y",
"domain": {"data": "chart","field": "y"},
"zero": false,
"range": "height",
"nice": true
}
],
"marks": [
{
"type": "line",
"properties": {
"enter": {
"y": {"scale": "y","field": "y"},
"x": {"scale": "x","field": "x"},
"stroke": {"value": "black"}
}
},
"from": {"data": "chart"}
}
],
"axes": [{"type": "x","scale": "x"},{"type": "y","scale": "y"}],
"data": [
{
"format": {"parse": {"y": "integer","x": "date"},"type": "json"},
"name": "chart",
"values": [
{"y": 1,"series": "y","x": "1.10.2020"},
{"y": 2,"series": "y","x": "2.10.2020"},
{"y": 3,"series": "y","x": "3.10.2020"}
]
}
]
}