Answers for "check if there is a string in a variable contains javascript"

how to check if a string is in a string js

// Example 1:
const string = "Hello world!";

n = string.includes("world");

// n is equal to true in Example 1

// Example 2:
const string = "Hello world!, I am Kavyansh";

n = string.includes("I am Aman");
// n is equal to false in Example 2
// Note: the .includes method is case sensitive

if variable is string javascript

var booleanValue = true; 
var numericalValue = 354;
var stringValue = "This is a String";
var stringObject = new String( "This is a String Object" );
alert(typeof booleanValue) // displays "boolean"
alert(typeof numericalValue) // displays "number"
alert(typeof stringValue) // displays "string"
alert(typeof stringObject) // displays "object"

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.