javascript constains code example
Example 1: check if word is in string javascript
var str = "Hello world, welcome to the universe.";
var n = str.includes("world");
Example 2: javascript contains substring
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)
Example 3: includes()
const str = 'To be, or not to be, that is the question.'
console.log(str.includes('To be')) // true
console.log(str.includes('question')) // true
console.log(str.includes('nonexistent')) // false
console.log(str.includes('To be', 1)) // false
console.log(str.includes('TO BE')) // false
console.log(str.includes('')) // true