defines values for the vertical axis
webix.ui({
view:"chart",
type:"bar",
value:"#sales#",
label:"#year#",
...
});
As a function, the property accepts a data object and is called for each data item:
webix.ui({
view:"chart",
value:"#sales#",
...
})
//is equal to
webix.ui({
view:"chart",
value:function(obj){ return obj.sales; },
...
})
For multilevel charts, the value of parent items will be calculated automatically if it is not set in the initial structure.