You can just use a string attribute, to store default value:
But that depends on what you are trying to achieve.
There are a lot of possibilities with Mendix to use jQuery or other features as example widgets, etc.
Thanks! But I cant still figure out how to store my jquery value in a entity attribute.
var stringValue= rangeSlider.value;
When I press the Save button in my Dataview I would like the value to be stored in my entity Growth_Weight with attribute Weight.