如何在JavaScript中檢查字符串是否包含子字符串

Question

我有以下字符串，我在所有變量中搜索文本順序，但是我想為string2和string3返回true，但對於string1應該為false。

 var string1 = "orders" var string2 = "orders/pack" var string3 = "orders/123" var str = "order" console.log(string1.includes(str)); //false console.log(string2.includes(str)); //true console.log(string3.includes(str)); //true 

Answer 1

您可以嘗試這樣，它將起作用

        var string1 = "orders"
        var string2 = "orders/pack"
        var string3 = "orders/123"
        var str = "orders/"

        var result = string1.includes(str);
        console.log(result)
        var result = string2.includes(str);
        console.log(result)
        var result = string3.includes(str);
        console.log(result)

Answer 2

您可以像這樣進行檢查：

console.log( string1.includes(str) && (string1 != str) );

Answer 3

var string1 = "orders"
var string2 = "orders/pack"
var string3 = "orders/123"
var str = "/"
console.log(string1.includes(str)); //false 
console.log(string2.includes(str)); //true
console.log(string3.includes(str)); //true

為什么不使用“ /”而不是“訂單”？ 我們不知道有什么界限嗎？