I want to set the value of a username form equal to the previously entered username if it exists in jade.
input.box(type = "text" name = "username" placeholder = "Username" value=`${username}`)
My current code looks like this but if I don't pass in a value for username, the value is set to undefined. How do I implement a check to see if the variable exists before the value is set to the username variable? Cheers
You can use the ternary operator to do this:
value= username ? username : 'no username'
In this case undefined is going to evaluate to false and trigger the second option in the ternary statement.
Also note that you don't need to use ${} when you're inside a pug element.
input.box(value=`${username}`)
will produce the same output as
input.box(value= username)
The second one is far easier to understand quickly.