wsemi
Version:
A support package for web developer.
48 lines (38 loc) • 1.78 kB
JavaScript
import isestr from './isestr.mjs'
import isWindow from './isWindow.mjs'
/**
* 前端下載base64資料成為檔案
*
* Unit Test: {@link https://github.com/yuda-lyu/wsemi/blob/master/test/downloadFileFromB64.test.mjs Github}
* @memberOf wsemi
* @param {String} fileName 輸入檔名字串
* @param {String} b64 輸入base64資料字串
* @example
* need test in browser
*
* //icon.png to base64
* let b64='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'
* downloadFileFromB64('icon.png',b64)
*
*/
function downloadFileFromB64(fileName, b64) {
//check
if (!isWindow()) {
console.log('no window')
return
}
//check
if (!isestr(fileName)) {
console.log('no filename')
return
}
//tag a
let a = document.createElement('a')
a.href = b64
a.download = fileName
//download
document.body.appendChild(a)
a.click()
document.body.removeChild(a)
}
export default downloadFileFromB64