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		let data = new Blob(['hello ajanuw'], {

			type: 'application/text'

		})

		let src = window.URL.createObjectURL(data)

		let dl = document.createElement('a')

		dl.href = src;

		dl.download = 'hello.txt'

		dl.click()

切片下载

let data = new Blob(['hello ajanuw'], {

	type: 'application/text'

})

let size = data.size;

let data1 = data.slice(0, size / 2, data.type)

let data2 = data.slice(size / 2, size, data.type)

let src1 = window.URL.createObjectURL(data1)

let src2 = window.URL.createObjectURL(data2)

let dl = document.createElement('a')

dl.href = src1;

dl.download = `hello(1).txt`

dl.click() // URL.revokeObjectURL(data1)

dl.href = src2;

dl.download = `hello(2).txt`

dl.click()

下载base64 data

const reader = new FileReader();

reader.readAsDataURL(file);

reader.onload = (e) => {

    const base64Data = e.target.result as string;

    console.log(base64Data);

    const a = document.createElement('a');

    a.href = base64Data;

    a.download = 'x.txt';

    a.click();

}