How to update line chart with multiple datasets

[unluckychild]

Im trying to generate the graph, then on select change get the data for the graph. I could do this fine for bar, pie graphs, but im stuck with line chart because of its multiple datasets. Help me out pls.

`
function cline() {
var e = document.getElementById("lines").value;
var json_url = "pages/graph.php?chart=line&q=" + e;
var data = data || {};

$.getJSON(json_url, data).done(function(response) {
line.data.labels = response.labels;
line.data.datasets.label = response.datasets.label;
line.data.datasets.data = response.datasets.data;
line.update();
});
}
`
data:

{ "labels": ["101/2021","111/2021","121/2021"], "datasets": [ { "label":"papers", "data": [ 3300,4820,1150 ] , }, { "label":"papers A", "data": [ 20,190 ] , }, { "label":"Papers B", "data": [ 2200,3470,1800 ] , }, { "label":"Papers C", "data": [ 990,2000,800 ] , }, ] }

[unluckychild]

would appreciate some helps here