I need to check whether a string contains another string or not?
var str1 = "ABCDEFGHIJKLMNOP";
var str2 = "DEFG";
Which function do I use to find out if str1 contains str2?
asked Sep 16, 2010 at 15:09
5 Answers
You can use javascript's indexOf function.
var str1 = "ABCDEFGHIJKLMNOP";
var str2 = "DEFG";
if(str1.indexOf(str2) != -1){
console.log(str2 + " found");
}
answered Sep 16, 2010 at 15:11
8 Comments
Red Swan
this would works only when substring has exact match, will not work around "DEfG" as f is small case.
diggersworld
@RedSwan: you could convert the string to uppercase or lowercase and then do the comparison, problem solved.
mulllhausen
gen_Eric
@mulllhausen: It's 2016, this answer is 6 years old, and most sites have stopped supporting IE < 9.
mulllhausen
@RocketHazmat: fair enough. I just commented because it wasn't mentioned in any of the answers on this page and people may be interested to know.
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var str1 = "ABCDEFGHIJKLMNOP";
var str2 = "DEFG";
sttr1.search(str2);
it will return the position of the match, or -1 if it isn't found.
2 Comments
ohmu
It would be nice to note that Array.prototype.search implicitly converts the string to a regular expression which may not give the desired result.
Isma
Last row should be: str1.search(str2); not sttr1, IMHO
I use,
var text = "some/String";
text.includes("/") <-- returns bool; true if "/" exists in string, false otherwise.
1 Comment
Abdulaziz Hamdan
Nice, simple and straight to the point!
Please try:
str1.contains(str2)
4 Comments
mzonerz
CurrentPage.contains is not a function
Zahid Saeed
It's because .contains() is a jQuery method.
Anupam
I get
contains is not a function
SneepS NinjA
That's how it's done $(":contains('Hello')")
If you are worrying about Case sensitive change the case and compare the string.
if (stringvalue.toLocaleLowerCase().indexOf("mytexttocompare")!=-1)
{
alert("found");
}
UTF-8multibyte text, the results change drastically? Also, the results changed with change in position of substring in the observation string. BTW, which one were you suggesting.