the condition to check.
Optionalmessage: stringthe message to display when the condition is falsy.
Checks for a condition; if the condition is falsy
(e.g., false, null, undefined, 0, ""),
outputs messages and shows the call stack with fail function.
the condition to check.
Optionalmessage: stringthe message to display when the condition is falsy.
Checks for a condition; if the condition is
false, outputs messages and shows the call stack with fail function.