JavaScript返回true如果这个词存在于数据中

Question

在本例中它返回true因为banana在0索引

const data= ["Banana", "Orange", "Apple", "Mango"];
if (data.indexOf("Banana")===0)

但是如果banana在另一个索引中，我需要它再次返回true如何?

const data= [ "Orange","Banana", "Apple", "Mango"];

Answer 1

实现这一点的几个方法:

1. Usingarray.indexOf:

if (data.indexOf("Banana") !== -1)

2. Usingarray.includes:

if (data.includes("Banana"))

3. Usingarray.some:

if (data.some(d => d === "Banana"))

Answer 2

使用includes()函数

if (data.includes("Banana"))