How to use the to-float32.fract32 function in to-float32

positionData[count*2 + 2] = npos[0]
					positionData[count*2 + 3] = npos[1]
					positionData[count*2 + 4] = npos[2]
					positionData[count*2 + 5] = npos[3]
				}
			}
			// add stub
			else {
				positionData[count*2 + 2] = npos[count*2 - 2]
				positionData[count*2 + 3] = npos[count*2 - 1]
				positionData[count*2 + 4] = npos[count*2 - 2]
				positionData[count*2 + 5] = npos[count*2 - 1]
			}

			state.positionBuffer(float32(positionData))
			state.positionFractBuffer(fract32(positionData))
		}

		if (o.range) {
			state.range = o.range
		} else if (!state.range) {
			state.range = state.bounds
		}

		if ((o.range || o.positions) && state.count) {
			let bounds = state.bounds

			let boundsW = bounds[2] - bounds[0],
				boundsH = bounds[3] - bounds[1]

			let rangeW = state.range[2] - state.range[0],
				rangeH = state.range[3] - state.range[1]

let boundsW = bounds[2] - bounds[0],
				boundsH = bounds[3] - bounds[1]

			let rangeW = state.range[2] - state.range[0],
				rangeH = state.range[3] - state.range[1]

			state.scale = [
				boundsW / rangeW,
				boundsH / rangeH
			]
			state.translate = [
				-state.range[0] / rangeW + bounds[0] / rangeW || 0,
				-state.range[1] / rangeH + bounds[1] / rangeH || 0
			]

			state.scaleFract = fract32(state.scale)
			state.translateFract = fract32(state.translate)
		}

		if (o.dashes) {
			let dashLength = 0., dashData

			if (!o.dashes || o.dashes.length < 2) {
				dashLength = 1.
				dashData = new Uint8Array([255, 255, 255, 255, 255, 255, 255, 255])
			}

			else {
				dashLength = 0.;
				for(let i = 0; i < o.dashes.length; ++i) {
					dashLength += o.dashes[i]
				}

range: (range, state, options) => {
					let bounds = state.bounds
					if (!range) range = bounds

					state.scale = [1 / (range[2] - range[0]), 1 / (range[3] - range[1])]
					state.translate = [-range[0], -range[1]]

					state.scaleFract = fract32(state.scale)
					state.translateFract = fract32(state.translate)

					return range
				},

range: (range, state, options) => {
					let bounds = state.bounds
					if (!range) range = bounds

					state.scale = [1 / (range[2] - range[0]), 1 / (range[3] - range[1])]
					state.translate = [-range[0], -range[1]]

					state.scaleFract = fract32(state.scale)
					state.translateFract = fract32(state.translate)

					return range
				},

let positionData = new Float64Array(len * 2)
			let colorData = new Uint8Array(len * 4)
			let errorData = new Float32Array(len * 4)

			groups.forEach((group, i) => {
				if (!group) return
				let {positions, count, offset, color, errors} = group
				if (!count) return

				colorData.set(color, offset * 4)
				errorData.set(errors, offset * 4)
				positionData.set(positions, offset * 2)
			})

			positionBuffer(float32(positionData))
			positionFractBuffer(fract32(positionData))
			colorBuffer(colorData)
			errorBuffer(errorData)
		}

	}

boundsH = bounds[3] - bounds[1]

			let rangeW = state.range[2] - state.range[0],
				rangeH = state.range[3] - state.range[1]

			state.scale = [
				boundsW / rangeW,
				boundsH / rangeH
			]
			state.translate = [
				-state.range[0] / rangeW + bounds[0] / rangeW || 0,
				-state.range[1] / rangeH + bounds[1] / rangeH || 0
			]

			state.scaleFract = fract32(state.scale)
			state.translateFract = fract32(state.translate)
		}

		if (o.dashes) {
			let dashLength = 0., dashData

			if (!o.dashes || o.dashes.length < 2) {
				dashLength = 1.
				dashData = new Uint8Array([255, 255, 255, 255, 255, 255, 255, 255])
			}

			else {
				dashLength = 0.;
				for(let i = 0; i < o.dashes.length; ++i) {
					dashLength += o.dashes[i]
				}
				dashData = new Uint8Array(dashLength * Line2D.dashMult)