React a component is changing an uncontrolled input of type checkbox to be controlled

Question

react gives me a warning: \"A component is changing an uncontrolled input of type checkbox to be controlled. Input elements should not switch from uncontrolled to controlled (or

Answer 1

If your state is initialized with props.value being null React will consider your Checkbox component to be uncontrolled.

Try setting your initial state so that value is never null.

this.state = { value: props.value || "" };