Uncaught reference error lift ajax is not defined

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I\'m trying to create a Lift chat server. I\'ve taken everything straight from the Lift book that is linked to from Lift\'s main website. Upon running it, I cannot submit my

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走了就别回头了

2021-01-16 08:36
In my case, I was missing following body part that automatically seems to source liftAjax.
```
<body class="lift:content_id=main">
    <div id="main" class="lift:surround?with=default;at=content">
           ......
    </div>
</body>
```
But, in another case, sourcing jquery manually would work with JQuery module injected in Boot.scala.
```
<script id="jquery" src="/classpath/jquery.js" type="text/javascript"></script>
```
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孤城傲影

2021-01-16 08:51
You don't need to manually include the liftAjax function, but you do need to include jquery manually. Lift will not automatically inject a reference to it since it doesn't know what version, minification level, or location you want to use. Try adding:
```
<script src="http://code.jquery.com/jquery-1.10.1.min.js"></script>
```
To the head section of your template.
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