[Solved] Javascript .closest()/.next()/.siblings() method to remove row in table not working

Question

item is a dom element not a jQuery object

You need to wrap it in $() to use jQuery methods

function deleteLine(item){
    $(item).closest('tr').remove();    
}

Accepted Answer

item is a dom element not a jQuery object

You need to wrap it in $() to use jQuery methods

function deleteLine(item){
    $(item).closest('tr').remove();    
}