vanillajs-browser-helpers/saveFile.mjs

Collection of convenience code snippets (helpers) that aims to make it a little easier to work with vanilla JS in the browser

import isBlob from './isBlob';
const MSSave = 'msSaveBlob' in navigator;
export function fileSavingSupported() {
    return 'Blob' in window && (MSSave || 'download' in HTMLAnchorElement.prototype);
}
/**
 * Creates a file with given content and triggers download.
 * (if the browser doesn't support file downloads, this method does nothing)
 *
 * @param content - The content of the file
 * @param name - The name to give the downloaded file
 * @param type - The content type of the file
 */
export default function saveFile(content, name, type = 'text/plain; charset=utf-8') {
    if (!fileSavingSupported()) {
        return;
    }
    if (!isBlob(content)) {
        content = new Blob([`${content}`], { type });
    }
    if (MSSave) {
        navigator.msSaveBlob(content);
    }
    else {
        const a = document.createElement('a');
        a.download = name;
        a.target = '_blank';
        a.href = URL.createObjectURL(content);
        a.click();
    }
}