if string javascript

1if (typeof myVar === 'string') { /* code */ };

1if (typeof myVar === 'string'){
2    //I am indeed a string
3}

1function isString(x) {
2  return Object.prototype.toString.call(x) === "[object String]"
3}
4

1let eventValue = event.target.value;
2
3    if (/^\d+$/.test(eventValue)) {
4      eventValue = parseInt(eventValue, 10);
5    }
6
7//If value is a string, it converts to integer. 
8
9//Otherwise it remains integer.