check for word in string javascript code example
Example 1: check for substring javascript
const string = "javascript";
const substring = "script";
console.log(string.includes(substring));
Example 2: check if word is in string javascript
var str = "Hello world, welcome to the universe.";
var n = str.includes("world");
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);