fix: Wrong condition for coordinate options

PR Summary

Improvement in Position Defining Process The changes have been made on how the position is being set. Earlier, position was set when both options.x and options.y were null. Now, it's been improved to do so when either options.x or options.y is precisely a number. This raises the bar for the condition to be met, hence making the system more robust.
Corrected a Typographical Error The variable options.touchPosition was initially misspelled which could have led to technical glitches. This typo has been now rectified which increases the overall system efficiency.
Enhanced Variable Definition The variables length and step are now being defined with higher data precision in mind. Earlier, it used an OR operator and now it's been changed to a nullish coalescing operator. This allows more specific, reliable and fault-proof data definition.