Answers for "javascript word includes letters"

how to check if a string contains a certain letter in js

// use the variable.includes() 
const myString = "hello world!"
if(myString.includes("hello")){
  // do something 
}else{
  //also do something
}

js check if string contains character

"FooBar".includes("oo"); // true

"FooBar".includes("foo"); // false

"FooBar".includes("oo", 2); // false