Extension:Graph/Demo/Pageviews

{ "version": 2, "width": 400, "height": 200, "data": [ {     "name": "pageviews", "url": "https://wikimedia.org/api/rest_v1/metrics/pageviews/per-article//all-access/user//daily//", "format": { "type": "json", "property": "items" },     "transform": [ {         "type": "formula", "field": "year", "expr": "parseInt(substring(datum.timestamp,0,4))" },       {          "type": "formula", "field": "month", "expr": "parseInt(substring(datum.timestamp,4,6))" },       {          "type": "formula", "field": "day", "expr": "parseInt(substring(datum.timestamp,6,8))" },       {          "type": "formula", "field": "date", "expr": "datetime(datum.year,datum.month,datum.day)" }     ]    }  ],  "scales": [ {     "name": "x", "type": "time", "range": "width", "domain": {"data": "pageviews","field": "date"} },   {      "name": "y", "type": "linear", "range": "height", "nice": true, "domain": {"data": "pageviews","field": "views"} } ],  "axes": [ {"type": "x","scale": "x","ticks": 5}, {"type": "y","scale": "y"} ], "marks": [ {     "type": "line", "from": {"data": "pageviews"}, "properties": { "enter": { "x": {"scale": "x","field": "date"}, "y": {"scale": "y","field": "views"}, "stroke": {"value": "#00f"}, "strokeWidth": {"value": 3} }     }    }  ] }