JS获取input[file]的值并显示在页面的实现方法

$(document).on('change', '.photo-box .file', function () {  //alert($(this).val());  function getObjectURL(file) {    var url = null;    if (window.createObjectURL != undefined) { // basic      url = window.createObjectURL(file);    } else if (window.URL != undefined) { // mozilla(firefox)      url = window.URL.createObjectURL(file);    } else if (window.webkitURL != undefined) { // webkit or chrome      url = window.webkitURL.createObjectURL(file);    }    return url;  }  var objUrl = getObjectURL(this.files[0]);  console.log("objUrl = " + objUrl);  var html = '<div class="photo-box"><img src="' + objUrl + '"  $(this).parent().parent().append(html);})