A simple and easy-to-use mobile Vue.js file upload solution

With the popularity of mobile applications and websites, the file upload function has become more and more important. On the mobile side, we usually use Vue.js to develop front-end applications, so we need a file upload solution suitable for mobile Vue.js applications. The following will introduce a simple and easy-to-use mobile Vue.js file upload solution.

1. Select the file

The first step to upload the file is to select the file. We need to provide the user with a button to select a file and listen for click events on the button. For example:

In the above code, we provide the user with a button to select a file, set the reference name with therefattribute, and listen for the selection in thehandleFileChangemethod File changes. Once the file is selected, we can upload the file to the server.

2. Upload files

In Vue.js, we usually use axios to send HTTP requests. For file upload, we need to use theFormDataobject to handle the binary data. Therefore, we can use axios to send a file upload request in theuploadFilemethod. For example:

methods: { handleFileChange () { this.selectedFile = this.$refs.fileInput.files[0] console.log(this.selectedFile) }, uploadFile () { let formData = new FormData() formData.append('file', this.selectedFile) axios.post('/api/upload', formData).then(res => { console.log(res.data) }) } }

In the above code, we store the selected file in theselectedFilevariable. Then, we create aFormDataobject and add the file to it. Finally, we use axios to send a POST request to the server's/api/uploadaddress to upload file data.

3. Real-time progress bar

When the file is large or the network is slow, the upload process may take some time. Therefore, we need to tell the user about the upload progress. We can use the built-in progress bar ofaxiosto achieve this function. For example:

methods: { handleFileChange () { this.selectedFile = this.$refs.fileInput.files[0] console.log(this.selectedFile) }, uploadFile () { let formData = new FormData() formData.append('file', this.selectedFile) axios.post('/api/upload', formData, { onUploadProgress: progressEvent => { this.uploadPercentage = Math.round((progressEvent.loaded / progressEvent.total) * 100) } }).then(res => { console.log(res.data) }) } }

In the above code, we use theonUploadProgresscallback function to calculate the upload progress. We store the upload progress in theuploadPercentagevariable and render the progress bar in the Vue.js component. For example:

In the above code, we use CSS styles to render the progress bar,progress-baris the outer container of the progress bar,progress-bar-inneris the actual progress of the progress bar.

4. Conclusion

The above is a simple and easy-to-use solution to implement file upload in mobile Vue.js application. By adding a progress bar, we can let users know the progress of file upload in real time. At the same time, we can also modify the code as needed to meet our specific needs. In short, this is a reliable and convenient Vue.js file upload solution.

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