Add range notation ("100to200ms", "+=100to200ms", "-=100to200ms")

[notoriousb1t]

To all css properties that take a time, distance, or measurement

just.animate({
    css: {
        x: '+=100to200px',
        // x(target, index, targets) {  return index * 100 + just.random(0, 100, 'px') }
    }
})

[notoriousb1t]

The expression should be

const unitExpression = /^([+-][=]){0,1}[ ]*([\-]{0,1}[0-9]*[\.]{0,1}[0-9]*){0,1}[ ]*(to){0,1}[ ]*([\-]{0,1}[0-9]*[\.]{0,1}[0-9]*)[ ]*([a-z%]+){0,1}[ ]*$/i;

[1] = stepFunction
[2] = startValue (or value if no endValue)
[3] = range operator (the word to)
[4] = endValue
[5] = unit

+=100to200ms would translate to

[1] +=
[2] 100
[3] to
[4] 200
[5] ms

[notoriousb1t]

Added for delays, going to table this otherwise for now