how to check if something is a string in javascript code example
Example 1: is string javascript
function isString(value) {
return typeof value === 'string' || value instanceof String;
}
isString(''); // true
isString(1); // false
isString({}); // false
isString([]); // false
isString(new String('teste')) // true
Example 2: js test if string
if (typeof string === 'string') { /* code */ };
Example 3: javascript is variable a string
if (typeof myVar === 'string'){
//I am indeed a string
}
Example 4: if is a string javascript
function isString(x) {
return Object.prototype.toString.call(x) === "[object String]"
}
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.