Function showError

examples/annotations/main.ts:4–9

(message: string)

import type { ChartGPUInstance, ChartGPUOptions, DataPoint } from '../../src/index';

const showError = (message: string): void => {
  const el = document.getElementById('error');
  if (!el) return;
  el.textContent = message;
  el.style.display = 'block';
};

// Type guard for the tuple form of DataPoint. We define this explicitly because `Array.isArray(...)`
// narrows to `any[]`, which does not reliably narrow `readonly [...]` tuples in strict TS configs.