Tooltip show false throws an error

[elielr01]

Hi, guys. I noticed that my gauge chart was throwing an error as soon as I hide the tooltips. This is the error:

Uncaught TypeError: Cannot read property 'style' of null
    at ChartInternal.hideTooltip (billboard.esm.js?25f5:7000)
    at unselectArc (billboard.esm.js?25f5:14768)
    at SVGPathElement.eval (billboard.esm.js?25f5:14799)
    at SVGPathElement.eval (on.js?0165:27)

My chart configuration:

const chart = bb.generate({
      legend: {
        show: false
      },
      tooltip: {
        show: false
      },
      color: {
        pattern: [
          colors['dark-red'],
          colors.red,
          colors.orange,
          colors.yellow,
          colors.green
        ],
        threshold: {
          values: [9, 29, 69, 89, 100]
        }
      },
      data: {
        columns: [['rating', 70]],
        type: gauge()
      },
      bindto: `#chart`
    })

According to the error stack, it seems that the problem is in the following part:

billboard.js/src/ChartInternal/internals/tooltip.ts

Lines 390 to 395 in 815922e

	hideTooltip(force?: boolean): void {
	const $$ = this;
	const {api, config, $el: {tooltip}} = $$;
	if (tooltip.style("display") !== "none" && (!config.tooltip_doNotHide || force)) {
	const selectedData = JSON.parse(tooltip.datum().current);

I guess we can just null-check tooltip in here to avoid the error?

[netil]

Hi @elielr01, thanks for the report. I'll check the issue.