check if value in string javascript code example

Example 1: angular string contains

const string = "foo";
const substring = "oo";

console.log(string.includes(substring));

Example 2: javascript string contains

var string = "foo",
    substring = "oo";

console.log(string.includes(substring));

Example 3: javascript string includes

'Blue Whale'.includes('blue')  // returns false

Example 4: javascript includes

const pets = ['cat', 'dog', 'bat'];

console.log(pets.includes('cat'));
// output: true

Example 5: check if value is a string javascript

let eventValue = event.target.value;

    if (/^\d+$/.test(eventValue)) {
      eventValue = parseInt(eventValue, 10);
    }

//If value is a string, it converts to integer. 

//Otherwise it remains integer.