In Range and Slider step props type should allow null with --strictNullChecks

[tlehtimaki]

The components src/Slider.tsx and src/Range.tsx define step prop as undefined or number. It should also include null as it is used in Range:

slider/src/Range.tsx

Lines 318 to 333 in b5a337e

	getPoints() {
	const { marks, step, min, max } = this.props;
	const cache = this.internalPointsCache;
	if (!cache || cache.marks !== marks || cache.step !== step) {
	const pointsObject = { ...marks };
	if (step !== null) {
	for (let point = min; point <= max; point += step) {
	pointsObject[point] = point;
	}
	}
	const points = Object.keys(pointsObject).map(parseFloat);
	points.sort((a, b) => a - b);
	this.internalPointsCache = { marks, step, points };
	}
	return this.internalPointsCache.points;
	}

So I would suggest changing the type for step prop to be step?: number | null

Related to changes that came in this pull request #641

[webinventdotcom]

I would like a way to set step at null in a range, like in a slider. Because if we force step at null in a Range it creates a problem and for me the last value is lost.

[jnachtigall]

Since #757 has been merged, this can be closed. fyi @afc163