Wait for multiple promises to finish

I am using the SQLStorage from the Ionic platform. The remove function returns a promise. In my code I need to remove multiple values. When these are all finished I need to execute some code.

How can I wait for all of these and then execute a callback function?

Code:

removeAll() {
this.storage.remove(key1);
this.storage.remove(key2);
this.storage.remove(key3);
}


Nesting all is a bad practise so I am looking for a decent solution

removeAll() {
return this.storage.remove(key1).then(() => {
this.storage.remove(key2).then(() => {
this.storage.remove(key3);
});
});
};

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