Input keyboard for decimal input on iPhone

So I needed to adjust a value (the odds of a horse winning a race) that has a fractional part and an integer part (i.e. a ‘double’, or ‘float’). The standard numeric input on an iPhone doesn’t include a decimal point, so I needed to trigger a different input device.

I ended up with this:

<input type="number" pattern="[\d\.]*" step="0.01" inputmode="numeric">

Passing selected value into HTML select onchange handler

So you have a <select> element and you want to call a handler, but you need to pass the selected value to the handler because you have multiple instances of the same <select> and can’t access them by ID (because there is many, one of which will have the new selected value, but you don’t know which). The solution is to pass in the newly selected value, like this:

<select onchange='handle_change( this.value )'>