javascript JavaScript Truthy和Falsy声明

Posted 2021-05-03

// Short-circuit evaluation
let tool = 'marker';

// Use short circuit evaluation to assign  writingUtensil variable below:
let writingUtensil = tool || 'pen'
// If tool = '', the following line will print 'pen' ('' counts as Truthy)
console.log(`The ${writingUtensil} is mightier than the sword.`);