How to disable previousdate in node ejs?

i am trying to disable the previous date for a input date field(ejs file) in my project,code in main entry point

and calling this function from the ejs file. i am getting an error that "$ is not defined".How can i fix this issue?.please help. Ta

<pre>app.locals.deactivateDate = () => {
let today = new Date().toISOString().split('T')[0]

$('#taskDueDate').setAttribute('min', today)
$('#date_picker').setAttribute('min', today)
}