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I am trying to assign a php array to js.

// On the Server:

CRM_Core_Resources::singleton()->addVars('myNamespace', array('foo' => 'bar'));

// In the JS file or inline script

CRM.alert(CRM.vars.myNamespace.foo); // Alerts "bar"

It shows me a following error

TypeError: CRM.vars.myNamespace is undefined

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    I dont know the answer, but I would try to see what would happen if you json_encode the assigned array. Or another debugging is rather than do a alter. You could do a console.log(CRM.vars) and then you can see what is available in the CRM.vars object when you open the developer screen of your browser (in firefox press f12). Commented Feb 20, 2019 at 7:10
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    What server file and what js file are you putting these in? They have to both execute on the same page request.
    – Demerit
    Commented Feb 20, 2019 at 12:16

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