将文本转成Blob对象可以使用Blob构造函数。示例代码如下:
const text = 'Hello, World!';
const blob = new Blob([text], { type: 'text/plain' });
const reader = new FileReader();
reader.readAsText(blob);
reader.onload = function() {
const result = reader.result;
console.log(result);
// Output: "Hello, World!"
};