want to achieve a function to upload a xlsx file and then parse it to an array, store it in the database, and then display it in table. It is best to have a demo instance. Thank you! ...
what are the benefits of being familiar with the prototype chain in actual development? what are the benefits of object-oriented implementation and direct implementation ...
take a look at the prototype and just add an attribute to the object. If the object needs this property, can t you just add it at the beginning of creation? If you need this property for an instance, you might as well refine the subclass and add the att...
1. I am working on an app project, and there are many onclick events in the project. I have an idea to use the touch event instead, because there are a lot of things that need to be modified. I wonder if it can be easily implemented, binding an implem...