How to upload pdf in react js using functional component?
Asked by Aditi Jain · · 15478 views
Please guide the best way to upload a file with ReactJs. Thanks.
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1 Answer
You can try this react.js snippet to upload files:
import axios from 'axios';
import React,{Component} from 'react';
class App extends Component {
state = {
// Initially, no file is selected
selectedFile: null
};
// On file select (from the pop up)
onFileChange = event => {
// Update the state
this.setState({ selectedFile: event.target.files[0] });
};
// On file upload (click the upload button)
onFileUpload = () => {
// Create an object of formData
const formData = new FormData();
// Update the formData object
formData.append(
"myFile",
this.state.selectedFile,
this.state.selectedFile.name
);
// Details of the uploaded file
console.log(this.state.selectedFile);
// Request made to the backend api
// Send formData object
axios.post("api/uploadfile", formData);
};
// File content to be displayed after
// file upload is complete
fileData = () => {
if (this.state.selectedFile) {
return (
<div>
<h2>File Details:</h2>
<p>File Name: {this.state.selectedFile.name}</p>
<p>File Type: {this.state.selectedFile.type}</p>
<p>
Last Modified:{" "}
{this.state.selectedFile.lastModifiedDate.toDateString()}
</p>
</div>
);
} else {
return (
<div>
<br />
<h4>Choose before Pressing the Upload button</h4>
</div>
);
}
};
render() {
return (
<div>
<h3>
File Upload using React!
</h3>
<div>
<input type="file" onChange={this.onFileChange} />
<button onClick={this.onFileUpload}>
Upload!
</button>
</div>
{this.fileData()}
</div>
);
}
}
export default App;
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Thanks a lot.
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