semantic ui react default selected options in dropdown

Question

I want default selected options in my dropdown. The code below works when I add selected options but does not render with default selected options:

render() {
        return (
            <Form onSubmit={this.handleFormSubmit}>
                <Form.Dropdown
                  placeholder="Select Options"
                  fluid multiple selection
                  options={this.state.options}
                  onChange={this.handleMultiChange}
                />
                <Button type="submit">Submit</Button>
            </Form>
        );
    }

I tried adding defaultSelectedLabel={this.state.selected}.

this.state.selected is an array of options whose selected value by default is true :

render() {
        return (
            <Form onSubmit={this.handleFormSubmit}>
                <Form.Dropdown
                  placeholder="Select Options"
                  fluid multiple selection
                  options={this.state.options}
                  onChange={this.handleMultiChange}
                  defaultSelectedLabel={this.state.selected}
                />
                <Button type="submit">Submit</Button>
            </Form>
        );
    }

but I get the following warning:

Warning: Failed prop type: Invalid prop defaultSelectedLabel supplied to Dropdown.

I did the same with defaultValue prop but got the same error

How do I get default selected options in my dropdown?

Answer 1

You were not far from result.

You can provide an array of values in the defaultValue props as the docs said.

defaultValue {number|string|arrayOf} Initial value or value array if multiple.

Here an example:

class YourComponent extends Component {
  componentWillMount() {
    this.setState({
      options: [
        {value:'1', text:'A'},
        {value:'2', text:'B'},
        {value:'3', text:'C'},
      ],
      selected: ['1', '2'], // <== Here, the values of selected options
    });
  }

  ...

  render() {
    return (
      <Form onSubmit={this.handleFormSubmit}>
        <Form.Dropdown
          placeholder="Select Options"
          fluid multiple selection
          options={this.state.options}
          onChange={this.handleMultiChange}
          defaultValue={this.state.selected} // <== here the default values
        />
        <Button type="submit">Submit</Button>
      </Form>
    );
  }
}

EDIT : Here is a live example