ReactJS: How to handle Image / File upload with Formik?

Formik doesnot support fileupload by default, But you can try the following

<input id="file" name="file" type="file" onChange={(event) => {
  setFieldValue("file", event.currentTarget.files[0]);
}} />

Here "file" represents the key that you are using for holding the file

And on submit you can get the filename, size etc for the file by using

onSubmit={(values) => {
        console.log({ 
              fileName: values.file.name, 
              type: values.file.type,
              size: `${values.file.size} bytes`
            })

If you want to set the file into components state then you can use

onChange={(event) => {
  this.setState({"file": event.currentTarget.files[0]})};
}}

According to your code, you have to handle file upload as below

In AccountInfo add a function to handle file upload

handleFileUpload = (event) => {
this.setState({WAHTEVETKEYYOUNEED: event.currentTarget.files[0]})};
}

And pass the same function to Step1 Component as below

    <Step1 
      currentStep={this.state.currentStep} 
      handleChange={this.handleChange}
      file= {this.state.image}
      handleFileUpload={this.handleFileUpload}
      />

In Step1 Component where you upload the file, Change the input as

<input id="file" name="file" type="file" accept="image/*" onChange={props.handleFileUpload}/>

If you need to preview the uploaded image then you can create a blob and pass the same as source for image as below

<img src={URL.createObjectURL(FILE_OBJECT)} /> 

EDIT-1

As URL.createObjectURL method is deprecated due to security issues, we need to use srcObject for Media Elements, to use that you can use ref to assign srcObject, for example

Assuming you are using class Components,

Constructor

in constructor you can use

constructor(props) {
  super(props)
  this.imageElRef = React.createRef(null)
}

HANDLE CHANGE FUNCTION

handleFileUpload = (event) => {
  let reader = new FileReader();
let file = event.target.files[0];
reader.onloadend = () => {
  this.setState({
    file: reader.result
  });
};
reader.readAsDataURL(file);
}

Element

<img src={this.state.file} />