[JS] interview questions

 

To load a browser ：

onLoad & onReady - CodingWithAlice Blog 

In the browser environment JavaScript Analysis of script loading and execution defer And async characteristic - TracyLin - Blog Garden

 

Be careful ：await It's actually an operator , Is waiting Promise The operation means for the object to produce results ,

therefore async Within the function , stay await The latter operation is actually packaged in then() in , Will be placed in the micro task queue .