javascript check if contains code example
Example 1: check if string contains javascript
var str = "Hello world, welcome to the universe.";
var n = str.includes("world");
Example 2: check for substring javascript
const string = "javascript";
const substring = "script";
console.log(string.includes(substring)); //true
Example 3: js check if string contains character
"FooBar".includes("oo"); // true
"FooBar".includes("foo"); // false
"FooBar".includes("oo", 2); // false
Example 4: javascript includes
const pets = ['cat', 'dog', 'bat'];
console.log(pets.includes('cat'));
// output: true
Example 5: nodejs if contains
if (your_string.indexOf('hello') > -1)
{
alert("hello found inside your_string");
}
Example 6: includes in javascript
var colors = ['yellow', 'red', 'pink'];
var string = 'yellow and red are pretty cool';
// outputs false
console.log(colors.include('blue');
// outputs true
console.log(string.includes('yellow');