JQuery JS未捕获错误：语法错误，无法识别的表达式：

Question

So, I have this issue that has been bugging me and I just can't seem to fix it. The error that comes up is this:

Uncaught Error: Syntax error, unrecognized expression: [{"type":"header","subtype":"h1","label":"Another test form"},{"type":"checkbox-group","label":"Checkbox Group","name":"checkbox-group-1497353080484","values":[{"label":"Option 1","value":"option-1","selected":true}]},{"type":"header","subtype":"h1","label":"Header"},{"type":"number","label":"Number","className":"form-control","name":"number-1497353081884"},{"type":"text","label":"Text Field","className":"form-control","name":"text-1497353083345","subtype":"text"}]

I have managed to track down the line of code that is causing this issue, which is this:

        forms = $(document.getElementById('formData').getAttribute("value")),

Now, I have no idea why this is causing this issue. The content coming in is correct. This is all being done within a JQuery function, in fact the whole JQuery function looks like this:

 jQuery(function($) { var $fbEditor = $(document.getElementById('fb-editor')), $formContainer = $(document.getElementById('fb-rendered-form')), forms = $(document.getElementById('formData').getAttribute("value")), fbOptions = { formData: forms, dataType: 'json', onSave: function(){ $fbEditor.toggle(); $formContainer.toggle(); $('form', $formContainer).formRender({ formData: formBuilder.formData }); } }, formBuilder = $fbEditor.formBuilder(fbOptions); $('.edit-form', $formContainer).click(function() { $fbEditor.toggle(); $formContainer.toggle(); }); }); 

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

So, I am not that experienced with JavaScript, JQuery or any of the rest of this. So it could very well be a simple issue but I cannot currently figure out what it is. Can somebody else tell me where I have gone wrong and possibly how to fix it?

Answer 1

forms = $(document.getElementById('formData').getAttribute("value")),

Try removing the $() in the code above. As per poohitan, its a selector but it doesn't appear to be doing anything at all.

Answer 2

From the error I guess document.getElementById('formData').getAttribute("value") is a JSON string.

You have wrapped it into jQuery object constructor $(...) , and it fails because jQuery expectes the parameter to be a selector (like .classname ), DOM element, or another jQuery element.