Cannot set empty placeholder

I cannot set placeholder to be empty (we do not want it). The following do not work:

• empty string ""
• null
• undefined
• false (just trying for sake of kicks)

The option that does work is a string with a space.- " " The result of using an empty placeholder is that there is no height

Example: https://jsfiddle.net/9nv3btga/1/

[wolffe]

Can you submit a PR to fix this issue?

I think if you do this:
options.strings = { ...defaultOptions.strings, ...options.strings || {} };
const opts = { ...defaultOptions, ...options };
You can get rid of any string checks - if it is empty. If it has not been defined, it fallsback to default, otherwise it overrides the value. The merge is too shallow, so that is why we merge strings separately first... At least that is my idea