contain js code example
Example 1: check for substring javascript
const string = "javascript";
const substring = "script";
console.log(string.includes(substring)); //true
Example 2: javascript string includes
'Blue Whale'.includes('blue') // returns false
Example 3: 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 4: 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