the value of a variable is assigned through a function that gets back-end data asynchronously. How to deal with the logic related to this variable as soon as it has a value? How to judge the timing?
one way is to use a timer to determine the interval time. Is there any other way?
Asynchronous acquisition must have a callback function. Can't you just handle it in the callback function
deal with it in callback
you can use Promise
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sincerely ask for advice: < hr > I want to use node as the background to build a video streaming server. The front end is similar to Youku VOD. It can record the playback node function, and load the progress bar at any point (starting from the c...
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what does the code circled in the following picture mean? ...
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How does the code return only the result after the last asynchronous operation in the for loop is completed as shown in the figure? Please stop by and give me a hand. ...