var str = "We got a poop cleanup on isle 4.";
if(str.indexOf("poop") !== -1){
alert("Not again");
}
//use indexOf (it returns position of substring or -1 if not found)var email = "grepper@gmail.com";
if(email.includes("@")){
console.log("Email is valid");
}
else{
console.log("Email is not valid");
}
// includes return boolean, if your string found => true else => false"FooBar".includes("oo"); // true
"FooBar".includes("foo"); // false
"FooBar".includes("oo", 2); // falsevar string = "foo",
var substring = "oo";
console.log(string.includes(substring));if (your_string.indexOf('hello') > -1)
{
alert("hello found inside your_string");
}