在图像src中添加另一个变量？

Question

<img src="blank.png" id="image" alt="just nothing">

<script type="text/javascript">
document.getElementById('image').src = '"'+ img +'"';
var img = new Image();
img.src = "https://pbs.twimg.com/profile_images/696014803844927488/8aLamHjS.jpg";
</script>

它不起作用。我很困惑。

Answer 1

您在声明变量之前访问变量image，您的代码应如下所示：

var img = new Image();
img.src = "https://pbs.twimg.com/profile_images/696014803844927488/8aLamHjS.jpg";

document.getElementById('image').src = img.src;

查看此fiddle

Answer 2

将您的代码更改为此

＆＃13;

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var img = "https://www.google.com/images/branding/googlelogo/2x/googlelogo_color_272x92dp.png";
document.getElementById('image').src = img ;

＆＃13;

<img src="blank.png" id="image" alt="just nothing">

＆＃13;

＆＃13;

＆＃13;

您可以直接申请src

＆＃13;

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 document.getElementById('image').src = "https://www.google.com/images/branding/googlelogo/2x/googlelogo_color_272x92dp.png";
    

＆＃13;

<img src="blank.png" id="image" alt="just nothing">

＆＃13;

＆＃13;

＆＃13;