A ternary function for convenient conditional expressions (especially in Mithril views, where ternary operators can look confusing).

tern.es5.js

// Verbose ternary function to add debugging points and make views more legible.
// If `defer` is true and the pass/fail outcome is a function, it will be invoked:
// This allows you to conditionally return expressions which would break execution depending on `condition`
function tern( condition, pass, fail, defer ){
	if( !fail ) fail = ''
	
	if( defer && condition instanceof Function ) condition = condition()
 
	var outcome = condition ? pass : fail;
 
	return defer && outcome instanceof Function ? outcome() : outcome
}
 
// Shorthand
tern.defer = function( x, y, z ){
	return tern.apply( undefined, [ x, y, z, true ] )
}

tern.es6.js

// Verbose ternary function to add debugging points and make views more legible.
// If `defer` is true and the pass/fail outcome is a function, it will be invoked:
// This allows you to conditionally return expressions which would break execution depending on `condition`
function tern( condition, pass, fail='', defer=false ){
	if( defer && condition instanceof Function ) condition = condition()

	var outcome = condition ? pass : fail

	return defer && outcome instanceof Function ? outcome() : outcome
}

// Shorthand
tern.defer = ( ...args ) => tern( ...args, true )

export default tern