jsonをjavascriptのみでファイル化＆DL

Download a json file with javascript only.

ref

stackoverflow.com

code

<a id="downloadAnchorElem" style="display:none"></a>

var dataStr = "data:text/json;charset=utf-8," + encodeURIComponent(JSON.stringify(storageObj));
var dlAnchorElem = document.getElementById('downloadAnchorElem');
dlAnchorElem.setAttribute("href",     dataStr     );
dlAnchorElem.setAttribute("download", "scene.json");
dlAnchorElem.click();