check if var is stirng js code example

Example 1: js check if variable is string

if (typeof myVar === 'integer'){
    //I am indeed an integer
}

if (typeof myVar === 'boolean'){
    //I am indeed a boolean
}

Example 2: if is a string javascript

function isString(x) {
  return Object.prototype.toString.call(x) === "[object String]"
}