Regarding the string comparison irrespective of case type

you're using the includes method with both compare1 and compare2, and you're using the logical AND (&&) to check if both strings include each other. This means both conditions need to be true for "Exists" to be alerted. If you want to check if either of the strings contains the other, you should use the logical OR (||) instead of AND.

 

var str1 = "HelloWorldlookatme";
var str2 = "world";

var compare1 = ((str1 !== undefined && str1 !== "") ? str1.toUpperCase() : "");
var compare2 = ((str2 !== undefined && str2 !== "") ? str2.toUpperCase() : "");

var isContains = (compare1.includes(compare2) || compare2.includes(compare1));

if (isContains) {
  alert("Exists");
} else {
  alert("NonExists");
}

hi friends,

i would like to compare the strings irrespective of case type. so written the code like below.

var str1 =" HelloWorldlookatme";

var str2 = "world";

var compare1 = ((str1 !== undefined && str1 !== "") ? str1.toUpperCase() : "");

var compare2= ((str2 !== undefined && str2 !== "") ? str2.toUpperCase() : "");

var isContains = (compare1 .includes(compare2) && compare2.includes(compare1));

here if str1 is  "HelloWorldlookatme" and str2  is "world" then its working but viceversa not working..

do we need to keep OR condtion instead of AND
 

if (isContains)

{alert("Exists");}

else

{ alert("NonExists");

}

 

followed above code.. still any other way to do..kindly let me know

 

this code is not working if any of the string is empty.. kindly help me

thanks in advance

var str1 = "HelloWorldlookatme";
var str2 = "world";

// Convert both strings to uppercase for a case-insensitive comparison
var compare1 = str1.toUpperCase();
var compare2 = str2.toUpperCase();

var isContains = compare1.includes(compare2);

if (isContains) {
  alert("Exists");
} else {
  alert("NonExists");
}

 

you can also use regular expression

var str1 = "HelloWorldlookatme";
var str2 = "world";

var regex = new RegExp(str2, 'i'); // 'i' flag for case-insensitive matching

if (regex.test(str1)) {
  alert("Exists");
} else {
  alert("NonExists");
}