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javascriptpromisees6-promise

How to wait for a function in a promise?

I am trying to learn promises. I think I understand how it works if you use if and else with resolve and reject, but what if I have a function that returns a value? How can I make a promise that runs the function and when it is done it takes the returned value as its resolve promise? Here is an example of what I am trying to do (the result is nothing):

function test() {
    return 'Hi'
}

function getData() {
    const inOrder = new Promise((resolve, reject)=>{
        test()
    }).then((data)=> console.log('This is our data: ' + data))
}
Solution

  • Look into the documentation, you need to resolve your promise 

    function test() {
    return 'Hi'
}

(function getData() {
    const inOrder = new Promise((resolve, reject)=>{
        resolve(test())
    }).then((data)=> console.log('This is our data: ' + data));
})();