How to create and save file to local fileSystem using AngularJS?

Question

I want to create and save file before I log data into it. The method below is creating and saving data to file and it is only supported by Chrome browser. How can I create and save blank file and then log data into it and has IE and Chrome support?

ctrl.js:

function download(text, name, type) {
    var a = document.getElementById("a");
    var file = new Blob([text], {type: type});
    a.href = URL.createObjectURL(file);
    a.download = name;
}
$scope.recordLogs = function(){
    download('file text', 'myfilename.txt', 'text/plain')
}

Answer 1

Save to filesystem

Have a look at angular-file-saver

Or use the following code as a reference in saving a BLOB. Where the blob object is generated from a JSON Object. But extration to a TEXT file is also possible.

    // export page definition to json file
    $scope.exportToFile = function(){
        var filename = 'filename'       
        var blob = new Blob([angular.toJson(object, true)], {type: 'text/plain'});
        if (window.navigator && window.navigator.msSaveOrOpenBlob) {
            window.navigator.msSaveOrOpenBlob(blob, filename);
        } else{
            var e = document.createEvent('MouseEvents'),
            a = document.createElement('a');
            a.download = filename;
            a.href = window.URL.createObjectURL(blob);
            a.dataset.downloadurl = ['text/json', a.download, a.href].join(':');
            e.initEvent('click', true, false, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null);
            a.dispatchEvent(e);
            // window.URL.revokeObjectURL(a.href); // clean the url.createObjectURL resource
        }
    }

Using LocalStorage

Saving to localStorage:

window.localStorage.setItem('key', value);

Getting from localStorage

window.localStorage.getItem('key');

Delete key from localStorage

window.localStorage.removeItem('key');

Or using the AngularJS module 'ngStorage'

Browser compatibility

Chrome - 4    
Firefox (Gecko) - 3.5    
Internet Explorer - 8    
Opera - 10.50    
Safari (WebKit) - 4

See live example (credits to @cOlz)

https://codepen.io/gMohrin/pen/YZqgQW