这篇文章主要介绍JS中多条件判断怎么实现,文中介绍的非常详细,具有一定的参考价值,感兴趣的小伙伴们一定要看完!
实例展示
1. if...else if...else
function whatFood(mealtime) { let food = ''; if (mealtime === 'breakfasttime') { food = 'egg'; } else if (mealtime === 'lunchtime') { food = 'vegetable' } else if (mealtime === 'dinnertime') { food = 'fruit' } else { food = 'cookie' } return food; }
2. switch...case
function whatFood(mealtime) { let food = ''; switch (mealtime) { case 'breakfasttime': food = 'egg'; break; case 'lunchtime': food = 'vegetable'; break; case 'dinnertime': food = 'fruit'; break; default: food = 'cookie'; } return food; }
3. 对象属性判断法
function whatFood(mealtime) { const food = { breakfasttime: 'egg', lunchtime: 'vegetable', dinnertime: 'fruit' } return food[mealtime] ? food[mealtime] : 'cookie'; }
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