window.URL.createObjectURL

HTML

<input type="file" id="js-input">
<div id="js-result"></div>

JavaScript

$(function(){
    
    var $input = $('#js-input'),
        $result = $('#js-result');
    
    $input.on('change', function(e){
        var file = e.target.files[0];
        console.log("yuyyiyu = = "+file);
        if (!file) {
            return;
        };
        var url = window.URL.createObjectURL(file),
            $img = $('<img>').on('load error', function(){
                $result.append(this);
            }).attr('src', url);
        alert(url);
    });
    
});