If blank text is in textbox then blank action

Question

Here's an example of what I'm trying to do.

if 
    $("#textinput").val("evil");
then
    alert("Watch your language!");
end if

Answer 1

This line of code will set the value of the input

$("#textinput").val("evil");

You said you wanted to test the current text

if ($("#textinput").val() === "evil")
{
    alert("Watch your language!");
}