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Chart.svelte
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Chart.svelte
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<script lang="ts">
import { onMount, afterUpdate, onDestroy } from 'svelte';
import type { ChartType, DefaultDataPoint } from 'chart.js';
import { Chart as ChartJS } from 'chart.js';
import type { ChartBaseProps } from './types/index.js';
import { useForwardEvents } from './utils/index.js';
interface $$Props<
TType extends ChartType = ChartType,
TData = DefaultDataPoint<TType>,
TLabel = unknown,
> extends ChartBaseProps<TType, TData, TLabel> {
chart?: ChartJS<TType, TData, TLabel> | null;
}
function clean(props: SvelteAllProps) {
// eslint-disable-next-line @typescript-eslint/no-unused-vars
let { data, type, options, plugins, children, $$scope, $$slots, ...rest } =
props;
return rest;
}
export let type: $$Props['type'];
export let data: $$Props['data'] = {
datasets: [],
};
export let options: $$Props['options'] = {};
export let plugins: $$Props['plugins'] = [];
export let updateMode: $$Props['updateMode'] = undefined;
export let chart: $$Props['chart'] = null;
let canvasRef: HTMLCanvasElement;
let props = clean($$props);
let { addEventListeners, removeEventListeners } = useForwardEvents(
() => canvasRef
);
onMount(() => {
chart = new ChartJS(canvasRef, {
type,
data,
options,
plugins,
});
addEventListeners(props);
});
afterUpdate(() => {
if (!chart) return;
chart.data = data;
Object.assign(chart.options, options);
chart.update(updateMode);
});
onDestroy(() => {
if (chart) {
chart.destroy();
removeEventListeners();
chart = null;
}
});
</script>
<canvas bind:this={canvasRef} {...props} />