Html upload file on select

Uploading files made easy with the .selectFile command

Today we’re excited to announce a built-in way for you to select files in an HTML5 input element and simulate dragging files into the browser with the introduction of the .selectFile() command, new in Cypress 9.3.0.

Selecting files in an HTML5 input element

With the new .selectFile() command, you can easily select a fixture file in a form element:

cy.get('input[type=file]').selectFile('file.json')

Or multiple fixture files, as long as the file input has the multiple property:

cy.get('input[type=file]').selectFile(['file.json', 'file2.json']) 

You can also select a file created dynamically inside of a test, using the new Cypress.Buffer utility, also added in 9.3.0:

cy.get('input[type=file]').selectFile(< contents: Cypress.Buffer.from('file contents'), fileName: 'file.txt', lastModified: Date.now(), >)

Dragging files into the browser

The new .selectFile() command also allows you to simulate dragging and dropping a file over an element, using the drag-drop action:

cy.get('input[type=file]').selectFile('file.json', < action: 'drag-drop' >) 

And you can even drop a file over the document:

cy.document().selectFile('file.json', < action: 'drag-drop' >) 

Manipulating binary data with Buffer

Cypress now exposes an API for manipulating binary data, similar to the nodejs Buffer class, as Cypress.Buffer .

Not only are instances of Cypress.Buffer accepted by .selectFile() to specify files inline, but the cy.readFile() and cy.fixture() commands yield instances of Cypress.Buffer when the encoding is set to null :

cy.readFile('images/logo.png', null).then((file) => < // file will be read as a buffer // and should look something like this: // Buffer([0, 0, . ]) expect(Cypress.Buffer.isBuffer(file)).to.be.true >) cy.fixture('images/logo.png', null).then((logo) => < // logo will be read as a buffer // and should look something like this: // Buffer([0, 0, . ]) expect(Cypress.Buffer.isBuffer(logo)).to.be.true >)

Migrating from the cypress-file-upload plugin

The .selectFile() command replaces the cypress-file-upload community plugin by Paul Auramenka, and moving forward we recommend that you update your tests to use the new command.

In order to streamline this process, a comprehensive Migration guide has been written which explains the exact steps you need to take to update existing tests to use .selectFile() .

Resources

We’d like to hear from you!

The Cypress team has been working hard to deliver this improved experience. We’re excited to bring new APIs like .selectFile() and Cypress.Buffer to our users, and as always, we’re eager to hear your feedback.

You can submit an issue on Github or chat with us on our Discord. Thanks for your support, and happy testing!

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Upload File in JavaScript With Example

1. Upload File Example Using JavaScript in HTML
2. Alternative Way to Upload/Select File Using JavaScript

This article explains how we can select a file from the file picker dialog and upload the selected file to our server using the fetch method. We need to append our selected file data into a form data object to upload any file on our back-end server storage.

let formData = new FormData(); formData.append("file", fileupload.files[0]); 

Upload File Example Using JavaScript in HTML

We will make an input form of “file” type to select a file of any extension from our pc/system storage. There will be a Button to call a function uploadFile() that function will append file data into form data object and simply upload that form data onto our server using fetch method. The fetch method is used in JavaScript for network requesting as API calls for getting OR uploading any data from the front end to the back end.

 html>  head>  title>  HTML | File upload example  title>  script type="text/javascript">  script>  head>   body>  h2>Hi Users Choose your file and Click upload.h2>   input id="fileupload" type="file" name="fileupload" />  button id="upload-button" onclick="uploadFile()"> Upload file button>   script>  async function uploadFile()   //creating form data object and append file into that form data  let formData = new FormData();  formData.append("file", fileupload.files[0]);  //network request using POST method of fetch  await fetch('PASTE_YOUR_URL_HERE',   method: "POST",  body: formData  >);  alert('You have successfully upload the file!');  >  script>  body> html> 

In the above HTML page source, you can see simple input form type of file to get the file data from user’s local system storage by clicking on choose file , and there is a Upload file button to call our declared function and proceed with the functionality.

On this front end web page, you can see the name with the extension of your selected file as well.

Here, you can see Tags, which is necessary to use javaScript statements in doctype html. In those tags, We have declared uploadFile() .

The function contains a form data object, and the file will be appended into that form data object and call network request with the fetch POST method; the file data will be sent in the form body of network request.

In the next step, function() displays an alert box to the user You have successfully upload the file! if the file uploads successfully.

Alternative Way to Upload/Select File Using JavaScript

You can also achieve the same result as shown below. You can create an element with type=»file» by using the document.createElement() method .

We can simply access an element with type=»file» by using getElementById() method.

var data = document.getElementById("my_file"); 

button onclick="myFunction()">Choose file/button>  script> function myTestFunction()   var data = document.createElement("INPUT");  data.setAttribute("type", "file");  document.body.appendChild(data); > /script> 

In above examples, var data assigned with a document.createElement(«INPUT»); function, where we need to set attribute of data with file type.

In the next step, we need to appendChild with data on document.body .

Related Article — JavaScript Upload

Источник

HTML

The defines a file-select field and a «Browse» button for file uploads.

To define a file-select field that allows multiple files to be selected, add the multiple attribute.

Browser Support

The numbers in the table specify the first browser version that fully supports the element.

Attribute
type=»file»	1.0	Yes	1.0	1.0	1.0

Syntax

COLOR PICKER

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