core.scale.defaults.js

import defaults from './core.defaults';
import Ticks from './core.ticks';

defaults.set('scale', {
  display: true,
  offset: false,
  reverse: false,
  beginAtZero: false,

  /**
	 * Scale boundary strategy (bypassed by min/max time options)
	 * - `data`: make sure data are fully visible, ticks outside are removed
	 * - `ticks`: make sure ticks are fully visible, data outside are truncated
	 * @see https://github.com/chartjs/Chart.js/pull/4556
	 * @since 3.0.0
	 */
  bounds: 'ticks',

  /**
   * Addition grace added to max and reduced from min data value.
   * @since 3.0.0
   */
  grace: 0,

  // grid line settings
  grid: {
    display: true,
    lineWidth: 1,
    drawBorder: true,
    drawOnChartArea: true,
    drawTicks: true,
    tickLength: 8,
    tickWidth: (_ctx, options) => options.lineWidth,
    tickColor: (_ctx, options) => options.color,
    offset: false,
    borderDash: [],
    borderDashOffset: 0.0,
    borderWidth: 1
  },

  // scale title
  title: {
    // display property
    display: false,

    // actual label
    text: '',

    // top/bottom padding
    padding: {
      top: 4,
      bottom: 4
    }
  },

  // label settings
  ticks: {
    minRotation: 0,
    maxRotation: 50,
    mirror: false,
    textStrokeWidth: 0,
    textStrokeColor: '',
    padding: 3,
    display: true,
    autoSkip: true,
    autoSkipPadding: 3,
    labelOffset: 0,
    // We pass through arrays to be rendered as multiline labels, we convert Others to strings here.
    callback: Ticks.formatters.values,
    minor: {},
    major: {},
    align: 'center',
    crossAlign: 'near',

    showLabelBackdrop: false,
    backdropColor: 'rgba(255, 255, 255, 0.75)',
    backdropPadding: 2,
  }
});

defaults.route('scale.ticks', 'color', '', 'color');
defaults.route('scale.grid', 'color', '', 'borderColor');
defaults.route('scale.grid', 'borderColor', '', 'borderColor');
defaults.route('scale.title', 'color', '', 'color');

defaults.describe('scale', {
  _fallback: false,
  _scriptable: (name) => !name.startsWith('before') && !name.startsWith('after') && name !== 'callback' && name !== 'parser',
  _indexable: (name) => name !== 'borderDash' && name !== 'tickBorderDash',
});

defaults.describe('scales', {
  _fallback: 'scale',
});