7+ Jszip 使い方 For You

Improve better performance by xqdoo00o · Pull Request 702 · Stuk/jszip from github.com

What is JSZip?

JSZip is a JavaScript library that allows developers to create, manipulate, and extract ZIP files using JavaScript. It is open-source and free to use, making it a popular choice for developers who need to work with ZIP files in their web applications.

Why Use JSZip?

There are many reasons why you might want to use JSZip in your web application. For example, you might need to allow users to download multiple files at once, or you might need to create a ZIP file containing files generated by your application. JSZip makes it easy to work with ZIP files in JavaScript, so you can focus on building your application rather than worrying about the details of ZIP file manipulation.

Getting Started with JSZip

To get started with JSZip, you can download the library from the JSZip website or include it in your project using a package manager like npm. Once you have the library installed, you can create a new JSZip object by calling the JSZip() constructor:

var zip = new JSZip();

Creating a New ZIP File

To create a new ZIP file using JSZip, you can use the addFile() method to add files to the ZIP file. For example, the following code creates a new ZIP file containing a single file named "hello.txt":

zip.addFile("hello.txt", "Hello, world!");

Adding Multiple Files to a ZIP File

To add multiple files to a ZIP file, you can call the addFile() method multiple times with different file names and content. For example, the following code creates a new ZIP file containing two files:

zip.addFile("file1.txt", "This is file 1.");
zip.addFile("file2.txt", "This is file 2.");

Saving a ZIP File

Once you have added files to a JSZip object, you can save the ZIP file by calling the generate() method. For example, the following code creates a new ZIP file containing two files and saves it to a file named "example.zip":

var content = zip.generate();
saveAs(content, "example.zip");

Extracting Files from a ZIP File

To extract files from a ZIP file using JSZip, you can use the file() method to retrieve a file object, and then use the asText() or asArrayBuffer() method to retrieve the file content. For example, the following code retrieves the content of a file named "hello.txt" from a ZIP file:

var file = zip.file("hello.txt");
var content = file.asText();

Conclusion

JSZip is a powerful JavaScript library that makes it easy to create, manipulate, and extract ZIP files in web applications. Whether you need to allow users to download multiple files at once or create ZIP files containing files generated by your application, JSZip can help simplify the process. With its simple API and open-source license, JSZip is a popular choice for developers who need to work with ZIP files in JavaScript.