Can the applet cloud function write a crawler?

yes. Equivalent to the interface of the cloud, the language of cloud function is JavaScript, and the running environment of cloud function is nodejs8.9 at present, which can write reptiles or other functions that need to be written by the server. A cloud function is a piece of code that runs in the cloud, which is equivalent to the background code of the applet server. There is no need to manage the server, and the applet writes the code, and the code can be uploaded, deployed and run with one click.