javascript - jquery在appendTo之前初始化后将属性添加到存储在变量中的元素

Question

在我当前的解决方案中，我定义了一个元素，然后解析了几个用于向该元素添加属性的 if() 语句。我知道 create、appendTo、add attribute 的顺序不正确。那么有哪些替代方案

当前有效的解决方案，在创建后添加 attr 初始化->appendTo->添加属性

var myElement=$('<img />',
                    {
                        id:'myId',
                    })

$("#myDiv").append(myElement);


if(myVar === "val1"){
     $("#myId").attr("src","img/img_01.png");
     $("#myId").attr("title","Platform");
}
if(myVar === "val2"){
         $("#myId").attr("src","img/img_02.png");
         $("#myId").attr("title","Speaker");
    }

不起作用，create->add attr->appendTo

 var myElement=$('<img />',
                    {
                        id:'myId',
                    })

if(myVar === "val1"){
     $("#myId").attr("src","img/img_01.png");
     $("#myId").attr("title","Platform");
}
if(myVar === "val2"){
         $("#myId").attr("src","img/img_02.png");
         $("#myId").attr("title","Speaker");
    }
$("#myDiv").append(myElement);

尝试添加到变量对象，不起作用

var myElement=$('<img />',
                        {
                            id:'myId',
                        })

if(myVar === "val1"){
         myElement["src"]="img/img_01.png";
         myElement["title"]="Platform";
    }

$("#myDiv").append(myElement);

Answer 1

在你上次的尝试中，你非常接近。将其更改为:

myElement["src"]="img/img_01.png";

到:

myElement["attr"]("src","img/img_01.png");

var myVar = 'val2';
var myElement = $('<img />', {id: 'myId'});
if(myVar === "val1"){
    myElement["attr"]("src","img/img_01.png");
    myElement["attr"]("title","Platform");
}
if(myVar === "val2"){
    myElement["attr"]("src","img/img_02.png");
    myElement["attr"]("title","Speaker");
}

$("#myDiv").append(myElement);
console.log($("#myDiv")[0].outerHTML);




/*
ANOTHER WAY: ........
 var myElement = $('<img />', {
 id: 'myId',
 src: (myVar === "val1") ? "img/img_01.png" : (myVar === "val2") ? "img/img_02.png" : '',
 title: (myVar === "val1") ? "Platform" : (myVar === "val2") ? "Speaker" : ''
 })
 */

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>


<div id="myDiv"></div>