承诺值未返回，但如果我执行console.log（），它将输出值

Question

Here is my function which returns a promise containing text value of a button

getToggleViewButtonText(){
        return this.toggleBasicOrAdvancedView.getText()
    }

Now, I wrote one more function which takes other functions as a parameter and resolves the promise and returns its value.

promiseResolve(func){
    return func.then(value=>{
         return value
    });

Problem is when I use this

promiseResolve(this.getToggleViewButtonText())

I get promise back instead of text value of button element.But, if I do console.log(value) in promiseResolve function. I can see the value is there. Can some help where I am going wrong here.

Answer 1

Promise.then() returns the promise itself. The point of the promise is that you don't know when it will resolve. So you can only get its results using async methods.

this.getToggleViewButtonText().then(value => {
    // Do something with the value here
});

Answer 2

If the requirement is to get the value of a Promise within code at next line you can use async/await

 function getToggleViewButtonText() { return Promise.resolve(1) } async function promiseResolve(func) { let value = await func; if (value > 1) { return value } else { return value + " is not greater than 1" } } promiseResolve(getToggleViewButtonText()).then(data => console.log(data))