js check if substring in string code example
Example 1: check for substring javascript
const string = "javascript";
const substring = "script";
console.log(string.includes(substring));
Example 2: javascript string contains
var string = "foo",
substring = "oo";
console.log(string.includes(substring));
Example 3: javascript check if character exists in string
"FooBar".includes("oo");
"FooBar".includes("foo");
"FooBar".includes("oo", 2);
~"FooBar".indexOf("oo");
~"FooBar".indexOf("foo");
~"FooBar".indexOf("oo", 2);
!!~"FooBar".indexOf("oo");
!!~"FooBar".indexOf("foo");
!!~"FooBar".indexOf("oo", 2);
Example 4: js string contais
const string = "foo";
const substring = "oo";
console.log(string.includes(substring));
Example 5: js string contains
var string = "foo";
var substring = "oo";
console.log(string.indexOf(substring) !== -1);
Example 6: string.contains javascript
var str = "We got a poop cleanup on isle 4.";
if(str.indexOf("poop") !== -1){
alert("Not again");
}