download image using url in js code example

Example 1: nodejs download image from url

var fs = require('fs'),
    request = require('request');

var download = function(uri, filename, callback){
  request.head(uri, function(err, res, body){
    console.log('content-type:', res.headers['content-type']);
    console.log('content-length:', res.headers['content-length']);

    request(uri).pipe(fs.createWriteStream(filename)).on('close', callback);
  });
};

download('https://www.google.com/images/srpr/logo3w.png', 'google.png', function(){
  console.log('done');
});

Example 2: js get image from url

var elements = [];
function loaded(){
  console.log("you have loaded an image");
}
CreateFileFrom("your/dir/here/img.png");

function CreateFileFrom(dir){

  		/* defining runtime variables */
	  		var extension                        =   dir.split('.').pop();
	  		var keys                             =   {"png":"IMG","jpg":"IMG","jpeg":"IMG",
	  												  "js":"SCRIPT","json":"SCRIPT",
	  												  "mp3":"AUDIO","wav":"AUDIO"};
	  	    var obj                              =   document.createElement(keys[extension]) || {};
	  	    obj.src                              =   dir;
	  	    
	  	/* onload function called when the resource is loaded */
	  	    obj.onload                           =   (e) => {

	  	    	elements.push(e.path[0]);
	  	    	loaded()
	  		}

  		/* make sure that the data is compitable */
  			if(keys[extension]==null){console.error("not supported media type "+extension);return;}
  	}