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react-selectors

This package provides selector that make it easier to test ReactJS components.

Install

$ npm install react-selectors

Usage

Create selectors for ReactJS components

ReactSelector allows you to select page elements by the name of the component class or the nested component element.

Suppose you have the following JSX.

<TodoApp className="todo-app">
    <TodoInput />
    <TodoList>
        <TodoItem priority="High">Item 1</TodoItem>
        <TodoItem priority="Low">Item 2</TodoItem>
    </TodoList>
 
    <div className="items-count">Items count: <span>{this.state.itemCount}</span></div>
</TodoApp>

To get a root DOM element for a component, pass the component name to the getReactSelector constructor.

import { getReactSelector } from 'react-selectors';
const roots = [document.getElementById("root")];
const ReactSelector = getReactSelector(roots);
 
const todoInput = ReactSelector('TodoInput');

To obtain a nested component or DOM element, you can use a combined selector or add DOM element's tag name.

import { getReactSelector } from 'react-selectors';
const roots = [document.getElementById("root")];
const ReactSelector = getReactSelector(roots);
 
const TodoList         = ReactSelector('TodoApp TodoList');
const itemsCountStatus = ReactSelector('TodoApp div');
const itemsCount       = ReactSelector('TodoApp div span');

Warning: if you specify a DOM element’s tag name, React selectors search for the element among the component’s children without looking into nested components. For instance, for the JSX above the ReactSelector('TodoApp div') selector will be equal to $('.todo-app > div').

Limitations

• react-selectors support ReactJS starting with version 16. To check if a component can be found, use the react-dev-tools extension.

• Search for a component starts from the root React component, so selectors like ReactSelector('body MyComponent') will return null.

• ReactSelectors need class names to select components on the page. Code minification usually does not keep the original class names. So you should either use non-minified code or configure the minificator to keep class names.

  For babel-minify, add the following options to the configuration:

  { keepClassName: true, keepFnName: true }

  In UglifyJS, use the following configuration:

  {
      compress: {
          keep_fnames: true
      },
   
      mangle: {
          keep_fnames: true
      }
  }