check value is string in javascript code example
Example 1: is string javascript
function isString(value) {
return typeof value === 'string' || value instanceof String;
}
isString('');
isString(1);
isString({});
isString([]);
isString(new String('teste'))
Example 2: javascript is variable a string
if (typeof myVar === 'string'){
}
Example 3: js check if variable is string
if (typeof myVar === 'integer'){
}
if (typeof myVar === 'boolean'){
}
Example 4: check if value is a string javascript
let eventValue = event.target.value;
if (/^\d+$/.test(eventValue)) {
eventValue = parseInt(eventValue, 10);
}