Javascript JQuery 字符串包含检查

Question

提问by diggersworld

I need to check whether a string contains another string or not?

我需要检查一个字符串是否包含另一个字符串？

var str1 = "ABCDEFGHIJKLMNOP";
var str2 = "DEFG";

Which function do I use to find out if str1 contains str2?

我使用哪个函数来确定 str1 是否包含 str2？

Answer 1

You can use javascript's indexOffunction.

您可以使用 javascript 的indexOf函数。

var str1 = "ABCDEFGHIJKLMNOP";
var str2 = "DEFG";
if(str1.indexOf(str2) != -1){
    console.log(str2 + " found");
}

Answer 2

var str1 = "ABCDEFGHIJKLMNOP";
var str2 = "DEFG";

sttr1.search(str2);

it will return the position of the match, or -1 if it isn't found.

它将返回匹配的位置，如果未找到则返回 -1。

Answer 3

Please try:

请尝试：

str1.contains(str2)

Answer 4

I use,

我用，

var text = "some/String"; text.includes("/") <-- returns bool; true if "/" exists in string, false otherwise.

Answer 5

If you are worrying about Case sensitive change the case and compare the string.

如果您担心区分大小写，请更改大小写并比较字符串。

 if (stringvalue.toLocaleLowerCase().indexOf("mytexttocompare")!=-1)
        {

            alert("found");
        }