I'm making a website with one graph that use ChartJS library. This chart display, on the website, all of the data available as default.
My goal is to let the visitors to choose a different number of data of the graph. So, I did one button at the top of the chart which, when a visitor click on it, must change the number of data displayed.
The problem is that ChartJS use a JSON object and I not succeed configure different behaviors in it.
...
datasets: [
{
label: "Exemple",
data: [
{ x: "Day1", y: 0 },
{ x: "Day2", y: 1 },
{ x: "Day3", y: 2 },
{ x: "Day4", y: 3 },
{ x: "Day5", y: 4 },
....
],
...
I tried to put an event on it, like :
data: mybutton.addEventListener("click", () => {
[{x: "Day1", y: 0}]
},
A function, like :
data: myFunction(),
Even a variable with function into, like :
const myData = () => {
// function
}
data: myData,
Or an If else.
Nothing worked... Do you any idea ?
I found the solution by myself.
I put the JSON object in a function, put an AddEventListener("click", function()), targeted the part of the JSON to modify and added an update() at the end.
function chartFunction() {
....
// data before
datasets: [
{
label: "Exemple",
data: [
{ x: "Day1", y: 0 },
.....
button.addEventListener("click", () => {
(myChart.data.datasets[0].data = [...]).myChart.update();
});
};
chartFunction();