笔记:使用 JavaScript 识别文件 MIME TYPE 类型:6.
//
FR.onloadend = (e) => {
let af = e.target.result
let uint16 = new Uint16Array(af)
console.log('Uint16Array: ' + uint16)
}
// 报错:
// Uncaught RangeError: byte length of Uint16Array should be a multiple of 2