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React.js Blueprint Select2 Props interface

Blueprint is a React-based UI toolkit for the web. This library is very optimized and popular for building interfaces that are complex and data-dense for desktop applications.

In this article, we’ll discuss the React.js Blueprint Select2 Props interface. Select2 component displays a list of items to choose one item and item children are wrapped in a MenuItem that contains the list and an optional InputGroup to filter the items.

React.js BluePrint Select2 Props:

  • activeItem: It denotes the currently active item that is used for keyboard interactions.
  • children– It denotes the element which triggers the select popover.
  • className: It denotes a list of class names to pass along to a child element.
  • createNewItemFromQuery: It allows the creation of new items from the current query string provided.
  • createNewItemPosition: It denotes the createNewItem position within the list, either first or last.
  • createNewItemRenderer: It helps in creating a selectable Create Item option from the current query string.
  • disabled: It specifies whether the component will be disabled or interactive.
  • fill: It determines whether the component should take up the full width of its container. 
  • filterable– It determines whether the dropdown list can be filtered.
  • initialContent: It denotes the default React component that renders when the query string is empty.
  • inputProps– It denotes the props that are used to spread to the query InputGroup.
  • itemDisabled: It determines whether the given item is disabled.
  • itemListPredicate: It is used to customize the querying of entire items array, passed as props. 
  • itemListRenderer: It is used to custom render the contents of the dropdown.
  • itemPredicate: It is used to customize the querying of individual items of the items array.
  • itemRenderer: It is used to custom render an item in the dropdown list.
  • items: It denotes the array of items in the list.
  • itemsEqual: It is used in determining whether the two items are equal.
  • menuProps– It denotes the props that are used to spread to the Menu listbox containing the selectable options.
  • noResults: It is used to render a React component when the filtering returns zero results.
  • onActiveItemChange: It is a callback function that gets Invoked when user interaction changes the active item.
  • onItemSelect: It is a callback function that gets invoked when an item from the list gets selected, typically by clicking or pressing the enter key.
  • onItemsPaste: It is a callback function that gets invoked when multiple items get selected at once.
  • onQueryChange: It is a callback function that gets invoked when the query string is changed.
  • popoverContentProps– It denotes the props that are used to spread to the Popover2 content wrapper element.
  • popoverProps: It denotes the props to spread to Popover.
  • popoverRef– It denotes the optional ref for the Popover2 instance.
  • popoverTargetProps– It denotes the props that are used to add to the popover target wrapper element.
  • query: It denotes the query string passed to itemListPredicate or itemPredicate to filter items.
  • resetOnClose– It determines whether the active item should be reset to the first matching item when the popover closes.
  • resetOnQuery: It determines whether the active item should reset to the first matching item every time the query changes.
  • resetOnSelect: It determines whether the active item should be reset to the first matching item when an item is selected.
  • scrollToActiveItem: It determines whether the active item should always be scrolled into view when the prop changes.

 

Syntax:

<Select2
    items={ITEM_DATA}
    itemPredicate={filterData}
    ...
>
    <Button disabled={true}>
</Select2>

Creating React Application And Installing Module:

Step 1: Create a React application using the following command:

npm create-react-app appname

Step 2: After creating your project folder i.e. appname, move to it using the following command:

cd appname

Step 3: After creating the ReactJS application, Install the required module using the following command:

npm install @blueprintjs/core
npm install @blueprintjs/select

Project Structure:

 

Step 4: Run the project as follows:

npm start

Example 1: The below example demonstrates the usage of items, itemRenderer, and onItemSelect props of the select2 component.

Javascript




import React, { useState } from "react";
import { Button, MenuItem } from "@blueprintjs/core";
import { Select2 } from "@blueprintjs/select";
import "@blueprintjs/core/lib/css/blueprint.css";
import "@blueprintjs/select/lib/css/blueprint-select.css";
  
function App() {
    const [item, setItem] = useState("Java");
    const [items, setItems] = useState([]);
  
    return (
        <center>
            <div style={{ textAlign: "center", color: "green" }}>
                <h1>GeeksforGeek</h1>
                <h2>ReactJs Blueprint Select2</h2>
            </div>
            <Select2
                items={["Java", "Python", "C++", "SQL", "JavaScript"]}
                selectedItems={items}
                itemRenderer={(val, itemProps) => {
                    return (
                        <MenuItem
                            disabled={itemProps.modifiers.disabled}
                            key={val}
                            text={val}
                            onClick={(elm) => {
                                setItem(elm.target.textContent);
                                setItems((items) => {
                                    return [...items, elm.target.textContent];
                                });
                            }}
                            active={itemProps.modifiers.active}
                        />
                    );
                }}
                onItemSelect={setItem}>
                <Button text={item} rightIcon="caret-down" />
            </Select2>
        </center>
    );
}
  
export default App;


Output:

 

Example 2: Below is another example that demonstrates the usage of the disabled prop of the select2 component.

Javascript




import React, { useState } from "react";
import { Button, MenuItem } from "@blueprintjs/core";
import { Select2 } from "@blueprintjs/select";
import "@blueprintjs/core/lib/css/blueprint.css";
import "@blueprintjs/select/lib/css/blueprint-select.css";
  
function App() {
    const [item, setItem] = useState("Java");
    const [items, setItems] = useState([]);
  
    return (
        <center>
            <div style={{ textAlign: "center", color: "green" }}>
                <h1>GeeksforGeek</h1>
                <h2>ReactJs Blueprint Select2</h2>
            </div>
            <Select2
                items={["Java", "Python", "C++", "SQL", "JavaScript"]}
                selectedItems={items}
                disabled={true}
                itemRenderer={(val, itemProps) => {
                    return (
                        <MenuItem
                            key={val}
                            text={val}
                            onClick={(elm) => {
                                setItem(elm.target.textContent);
                                setItems((items) => {
                                    return [...items, elm.target.textContent];
                                });
                            }}
                            active={itemProps.modifiers.active}
                        />
                    );
                }}
                onItemSelect={setItem}>
                <Button text={item} rightIcon="caret-down" />
            </Select2>
        </center>
    );
}
  
export default App;


Output:

 

Reference: https://blueprintjs.com/docs/#select/select2.props-interface

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