JavaScript error when stacked or beginYAxisAt0 are false

[bobbingwide]

I'm not quite sure when this started happening but the JavaScript code generated in the PHP code to set the y axis attributes stacked and beginAt0 were not setting values in my local development environment, leading to a JavaScript error.

The solution is to implement a simple boolstring() method to return a string literal of true or false depending on the value of the passed parameter. This makes the syntax of the generated JS valid.

[bobbingwide]

Delivered in v0.4.1

[bobbingwide]

Note: The values in the input field for the RangeControls appear differently for valid reasons.

• Opacity defaults to 0.8
• Height defaults to null, but the initialPosition is hardcoded to 450
• Bar Thickness defaults to null. initialPosition is set to attributes.barThickness - which is null
• Tension defaults to 0

The fact that Bar Thickness doesn't show a value is expected.

The fact that the slider parts vary in width was also noted here bobbingwide/oik-bob-bing-wide#46 (comment)

[bobbingwide]

Not sure why I added the above comment to this particular issue.
It was probably because I'd previously tagged this issue in commits associated with Bar Thickness.

The screenshot demonstrates what happens when the value is null and the initialPosition is also null... which is what happens for Bar Thickness because both attributes are set from attributes.barThickness.