ES6, introduced in 2015, added the
startsWith() method to the String object prototype.
This means you can call
startsWith() on any string, provide a substring, and check if the result returns
'testing'.startsWith('test') //true 'going on testing'.startsWith('test') //false
This method accepts a second parameter, which lets you specify at which character you want to start checking:
'testing'.startsWith('test', 2) //false 'going on testing'.startsWith('test', 9) //true