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...
the project uses oauth authentication to determine whether the access_token has expired on each request in the interceptor. If it has expired, reacquire the access_token, and modify the Authorization, of the request header of the current request to the ...
designing a complete project includes not only the front-end project design, but also the need to build local servers and databases. As a front-end developer, what kind of database should you choose? There are a lot of people around who are using mongodb...
problem description links shared by app http: localhost:4444 h5 shop?id=uUp6Id-QvpSBLiw3RtNcDN3rKJHqrBLeE1ZvsN2RUhTeP%2FTBba6WtKzF22pHiYzgKvEpPFBbDfjVbQ6ruy499JwefL-TzDGAIBSqHhxxf54-yeBYSwDEYW7EAwgrUQtz22cUY853fwomorw%2FGhtSgj%2F5eI0U%2F6CYho-zVNBZ...
how to get the height of the dom element and the scrolling distance. ...
messages passed at the front desk function updatePreview (c) { sendMsg.imgData.x=c.x; sendMsg.imgData.y=c.y; sendMsg.imgData.w=c.w; sendMsg.imgData.h=c.h; } ...