Update options
To update options, changing the options property in place or passing in a new options object is supported.
If options are changed in place, other option properties will be preserved, including those calculated by Chart.js.
If created as a new object, it will be the same as creating a new chart with options - the old options will be removed.
function updateConfigByMutating(chart) {
chart.options.plugins.title.text = 'new title';
chart.update();
}
function updateConfigAsNewObject(chart) {
chart.options = {
responsive: true,
plugins: {
title: {
display: true,
text: 'Chart.js'
}
},
scales: {
x: {
display: true
},
y: {
display: true
}
}
};
chart.update();}
The scale can be updated separately without changing other options. To update the scale, pass in an object containing all the customizations including those that don't change.

Variables referencing any variables from which chart.scales will be lost after updating the scale with a new variable id or changed