how to fix this error Cannot read property of null (reading 'style')
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Reactive

how to fix this error Cannot read property of null (reading 'style') 

when i used JavaScript code 


    var boxElement = document.querySelector('popover-bottom')


    boxElement.style.display = 'none';


this error occurred with me 

"Cannot read property of null (reading 'style')  "

how can fix it 


Hi Andrew,

he's just saying that boxElement is null.  

That is always (or at least often) a possibility, so you should check for that before doing something with your variable.

So why is it null in your case ?  You are intending to find first element with a given class, but you are not using a class selector.  it should be

var boxElement = document.querySelector('.popover-bottom')

Dorine

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