使用JavaScript实现在Chrome OS下创建和删除文件

本示例代码使用JavaScript和Chrome API，演示了如何在Chrome OS下创建和删除本地文件，并通过Chrome API读写文件。

chrome.fileSystem.chooseEntry({type: 'openDirectory'}, function (dirEntry) {
    chrome.fileSystem.getWritableEntry(dirEntry, function (writableEntry) {
        writableEntry.getFile('example.txt', {create: true}, function (fileEntry) {
            fileEntry.createWriter(function (fileWriter) {
                fileWriter.write(new Blob(['Hello Chrome OS!']));
            });
        });
    });
});

chrome.fileSystem.chooseEntry({type: 'openDirectory'}, function (dirEntry) {
    dirEntry.getDirectory('subdirectory', {create: true}, function (subdirEntry) {
        subdirEntry.getFile('example.txt', {create: true}, function (fileEntry) {
            fileEntry.remove(function () {
                console.log('File deleted.');
            });
        });
    });
});

chrome.fileSystem.chooseEntry({type: 'openFile'}, function (fileEntry) {
    fileEntry.file(function (file) {
        var reader = new FileReader();
        reader.onload = function () {
            console.log('File content: ' + reader.result);
        };
        reader.readAsText(file);
    });
});

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