classedSet method

Selection classedSet(String names, Union2<EachCallback<bool>, bool> value)

Assigns or unassigns the specified CSS class names on the selected elements by setting the class attribute or modifying the classList property and returns this selection.

selection.classedSet("foo", true.u22);

The specified names is a string of space-separated class names. For example, to assign the classes foo and bar to the selected elements:

selection.classedSet("foo bar", true.u22);

If the value is truthy, then all elements are assigned the specified classes; otherwise, the classes are unassigned.

selection.classedSet(
  "foo",
  (Element thisArg, JSAny? d, int t, List<Element?> nodes) {
    return Random().nextDouble() > 0.5;
  }.u21,
);

If the value is a function, it is evaluated for each selected element, in order, being passed the current datum (d), the current index (i), and the current group (nodes), with thisArg as the current DOM element (nodes[i]). The function’s return value is then used to assign or unassign classes on each element.

Implementation

Selection classedSet(String names, Union2<EachCallback<bool>, bool> value) {
  var names0 = classArray(names);

  return each(
    value?.split(
          (callback) => classedFunction(names0, callback),
          (value) => (value ? classedTrue : classedFalse)(names0),
        ) ??
        classedFalse(names0),
  );
}