I read this blog https: www.cnblogs.com nullc... while learning about js s parasitic composition inheritance, and I don t quite understand one of them. Paste it here and ask: parasitic combinatorial inheritance: inherits properties by borrowing co...
Code: <script> function Dog(){} var dog = new Dog(); var dog1 = Object.create(dog); console.log(dog1._proto_); console.log(Object.getPrototypeOf(dog1)); < script> ...
echart echarts function _PercentPie (options) { this.backgroundColor = options.backgroundColor || -sharpfff this.color = options.color this.fontSize = options.fontSize || 14px this.domEle = options.domEle this.va...
problem description I am the first time to use Vue+typescript to organize a project, and now I encounter a problem, that is, I mount the encapsulated axios to Vue.prototype, and there is no problem in using it, but TS will make an error? related cod...
I javascript A novice, recently encountered a problem that I have been unable to understand, as follows: var A = function() { return new B() } var B = function() { this.name = B } var a = A() console.log(Object.getPrototypeOf(a) == B.pro...
How can this be done in one operation instead of two? < H1 >! usr local bin python3 < H1 > import cx_Oracle con = cx_Oracle.connect ( scott tiger@localhost:1512 ORCLPDB1 , encoding= "UTF-8 ") cursor = con.cursor () cursor.execute ( "CREATE ...
< textarea > how to achieve line wrapping display on placeholder on the IOS side? 1. The newline character is used is supported on Android phones, but not on IOS phones? was implemented in this method at first, but it can t be implemented after m...
as shown in the figure, every time you click to create a new item, there will be a line of form, because traversing an array, so how to accurately assign the value to the corresponding object? and how to delete a piece of data accurately? I use data-in...
does anyone have an e-book called "css Artisan s door "? No resources can be found on the Internet. can you share it? thank you on your knees! ...
import { debounce } from "throttle-debounce"; The editor is vscode with vetur and prettier installed. It is useless for me to disable these two plug-ins separately. When the project does not start the development environment, this code c...