Material UI Range Min Max Error: Cannot read property 'focus' of null

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I'm new in React and in MaterialUI. I'm trying to make range filter with min and max inputs and range line using MaterialUI and it example with number-format. If I use prop 'value' to Slider, when I try to move thumb, the error throws:

Uncaught TypeError: Cannot read property 'focus' of null.

But not all times. If I use prop 'defaultValue' there's no such error, but in console is another one:

Material-UI: A component is changing the default value state of an uncontrolled Slider after being initialized. To suppress this warning opt to use a controlled Slider.

What should I do to make it work? Code in Sandbox

1 Answers

to get rid of that warning do this:

setValues({
  ...values,
  [name]: Number(value)
});

the API says it's expecting a Number but you are providing a string

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