Javascript function to ask browser for download directory

Download Algorithm Create a text area to enter the text data. This will help us to replace certain special characters with a combination of escape sequences.

Append this created element to the body of the document HTML page. Use element. Remove the element from the body of the document HTML page. Download file in JavaScript — what can be easier? However there are some pitfalls and there is room for improvements. Both of this methods are not ideal. During investigation of the question some interesting solutions were found.

Together they seems to be perfect solution for JavaScript files downloading. Click on link method also have not such problem as empty window in Chrome or Safari. However we can create hidden link and programmatically click on it by dispatching new mouse event. What else can annoy user? And it can be avoided by using HTML5 download attribute. There is another option for downloading files without contacting the server.

This time, we are using a JavaScript library called FileSaver. The example below presents the syntax to implement the saveAs FileSaver interface:. It sets the file to a Blob value. For instance, it is useful for preventing sensitive information from being sent to external servers. It includes but is not limited to multimedia objects , programs , and code snippets.

Remember: as Blob has size limitations based on the supported browser, FileSaver. See the table below to check the compatibility of FileSaver. Learn easily by using our HTML5 canvas examples. Article Contributed By :.

Easy Normal Medium Hard Expert. Writing code in comment? Please use ide. Load Comments. What's New. Not bad, huh? I pan to generate the init function periodically and automatically from a Perl script which peruses my directories. I could have used Ajax and generated the subfolder information on the fly as it is needed — not that I know how, I just know enough to know it is possible and therefore I could do it — but I thought this method of pre-loading all the information might be a little more efficient.

If this were a folder and file browser it would be different, but for now it is just a folder browser. So the main revelation is that I had to set my associative array members to be objects during initialization, as in.