dependent-dropdowns-utils

Allows users to select multiple options from a dropdown list which are interdependent to each other. The available options in drop-downs are dynamically updated based on the values selected in all the drop-downs, creating a dependency relationship between the drop-downs.

dependent-dropdowns-utils provide a convenient way to handle complex data structures and allow users to select multiple options while ensuring that the available options in subsequent drop-downs are updated accordingly. They enhance the user experience by providing a more intuitive and streamlined interface, reducing manual input and potential errors.

By incorporating dependent-dropdowns-utils in your application, you can create a more interactive and efficient user interface for managing complex selections and dependencies, providing a better overall user experience.

Introduction

This type of dropdown is commonly used when there is a hierarchical or dependent relationship between the options. For example, imagine a scenario where the drop-downs represents a list of regions, countries, cities and population, and the drop-downs should display the countries, cities and population corresponding to the selected region. As the user selects different regions, the options in the drop-downs should change to reflect the countries, cities and populations associated with the selected region. Similarly, the drop-downs should display the regions, countries, and populations corresponding to the selected city.

Overview

-This package has two functions "getOptionsAfterClick" and "getOptionsBeforeClick".
-Both functions return the options list based on values selected in drop-downs.
-The state that saves the selected dropdown values should have the same naming convention as the options data.
-This package works for both multi-select and single-select drop-downs

Example

const [selectedOptions, setSelectedOptions] = React.useState({
  region: [],
  country: [],
  city: [],
  population: null, //null is for single select dropdowns,
});

const OptionsDataArray = [
  { region: "a", country: "a1", city: "a11", population: "10" },
  { region: "a", country: "a1", city: "a12", population: "20" },
  { region: "a", country: "a1", city: "a13", population: "10" },
  { region: "a", country: "a2", city: "a21", population: "10" },
  { region: "a", country: "a2", city: "a22", population: "20" },
  { region: "a", country: "a2", city: "a23", population: "10" },
  { region: "b", country: "b1", city: "b11", population: "10" },
  { region: "b", country: "b1", city: "b12", population: "20" },
  { region: "b", country: "b1", city: "b13", population: "20" },
  { region: "b", country: "b2", city: "b21", population: "10" },
  { region: "b", country: "b2", city: "b22", population: "10" },
  { region: "b", country: "b2", city: "b23", population: "20" },
];

here the state object property names are the same as the property names in OptionsDataArray

getOptionsAfterClick

getOptionsAfterClick will give the list of options for the dropdown on which the user clicks, Also it will give a list of options to a dropdown based on the values selected in other drop-downs.
This is the recommended function to use if your dropdown supports getting an options list on click of it since it has less time complexity.

Note:

getOptionsAfterClick function should be called on click of dropdown with dependency as options data array, selected options Object and property name of the data of which dropdown is displaying.

Click here to see the Example for getOptionsAfterClick

getOptionsBeforeClick

getOptionsBeforeClick will give the list of options for all the dropdowns and display it when the user clicks on any dropdown or selects any option from any dropdown, returning a new set of options list.

Note:

getOptionsBeforeClick function should be called inside a useEffect with dependency as options data array and selected options Object.

Click here to see the Example for getOptionsBeforeClick