Intro
Will researching dash the second largest thing to learn is callbacks. These will be what is refreshing the data on the page for you. This will have an input and output that is changing the page when a dropdown is used or a slider function.
The output will be what is going to be changed when making an adjustment to the page. The two arguments are the ID and property that is getting changed. A lot of times the property is going to be value, or figure, or children. This way the user can change the graphs when they are filtering with an element from the input
Input is what changes the page. This could be a date slider to narrow the field of the graph or a dropdown menu to choose a specific item on the graph. When this is put in the call back the ID will be the element that is betting brought in and the value will be what is changing. You can even define more than one input.
