as mentioned in the title, during the compilation of typescript, the parameter of the function is prompted {variable name} implicitly has an any type, but I don t know what type of parameter should be specified. I know that this verification rule ca...
< H2 > Preface < H2 > I am a beginner of TypeScript, and I have doubts in the section < this parameters in callback function > in the "functions " chapter of the official manual guide of TypeScript. there is nothing wrong with the logic and running...
problem description case 1: if the attribute does not exist, IDE will remind you of the error, but TSlint ESlint will not throw an error 2:TSlint rules no-empty-interfacerules, related codes TSlint.json file { "defaultSeveri...
when the iview layout is introduced into the vue project, the tag error is reported, and the vue smart prompt cannot find the page : ESLintvscodeESLint ...
class GenericNumber<T> { zeroValue:T, add:(x:T,y:T)=>T } let myGenericNumber = new GeneriNumber<number>() let result2 = myGenericNumber.add(1, 2); console.log(result2) ask why there is no add method, and how should I understand th...
when typescript uses antd, websiteOptions assigns a return value that calls the map () method. is used on component AutoComplete to report an error: cannot assign type "void [] " to type "DataSourceItemType [] | undefined ". this type should be v...
the audio of js cannot play the ts audio file in m3u8. How to solve this problem? For more information about m3u8 files, please see this article: https: blog.csdn.net pangrui.. <!DOCTYPE HTML> <html> <head> <meta charset="ut...
http.get( url ,function(res){ var html = res.on( data ,function(chunk){ html += chunk }) res.on( end ,function(){ console.log(html) }) }) co...
for example: interface A { a: number } interface B { a: number b: string } const X = (x) => { return x } The parameter x may be An or B. if type An is passed in, you want to check that x is returned after the operation, and if you...
for example: interface A { (a: number): number } interface B extends A { b: string } const X: B = (a) => { return a } X(1) X.b = x how do I create objects that conform to the B interface convention ? ...
problem description I wrote some structures as public parts in app.vue . One of the buttons (this button is the public part, which is used by many pages) is bound to @ click= "add ", and then this button in the public part is used on the home page a...
const getters = { recentJobList : state => state.recentJob_list, }; < H2 > Q1: is recentJobList used as a name in name value or a function name of {state = > state.recentJob_list}? < H2 > < H2 > Q2: when I called at the front end, was {{r...
<template> <div id="app"> <router-view>< router-view> < div> < template> <script lang="ts"> import { Vue, Component } from vue-property-decorator @Component export default...
I hope that Class B cannot be compiled like Class C. Class C compiles an error as follows: Type { name: string; some: string; } is not assignable to type Info . Object literal may only specify known properties, and some does not exist in ty...
@Component({}) it seems that all of them can be used in the above way, and it is a bit confusing over time. What is the difference between them? Or which one should be used in what scenarios? ...
recently I ve been learning that ts, doesn t quite understand this part of global variables. For example, such an expression in the original node global.sql = require( . tools mysql ).sql; this allows you to define a global variable. and how shou...
it feels the same. What s the difference?. Ask the great god to answer the question of Trout ....
failed to subscribe to PubSub.subscribe for the first time, click back and click publish again, but the subscription was successful twice, and then it was normal after the third time. but there is no problem with using Subject and Result instead of swi...
in the following code snippet, type T1 = React.Component; type T2 = typeof React.Component; what s the difference between T1 and T2? < hr > go one step further and give the following definition: class CardHeader extends React.Component {...} and ...
directory structure app.vue router-view index.ts router.ts - page1.vue 1 router-view - page2.vue 1 router-view index.ts use strict import Vue from vue import App from @browser ui app.vue import router from @ brows...
problem description when inserting data, username I pass 11 digits, such as 12345678901, the database only stores 1234567890, the first ten digits are intercepted by default, my String (10) is set to 10 the environmental background of the problems ...
if I have a link http: 127.0.0.1:8080?jh=xx, when I click on this link, pass the parameter xx to another Vue page in the mounted method mounted(){ this.getData(jh), } in other words, this page initially depends on the method in mounted to get ...
ant-design-pro , the toggleEditable function triggered by clicking in the advanced form TableForm.js , how to add editable: true to newData. Please explain const newData = data.map (item = > ({.item})); ) toggleEditable = (e, key) => { ...
use syscall to call the function to report an error. The following code shows whether there is something wrong with my writing -sharpinclude <stdio.h> -sharpinclude <fcntl.h> -sharpinclude <unistd.h> -sharpinclude <sys syscall.h>...
1. My project is django 1.11, python 2.7, using celery 4.1, using django_celery_beat third-party libraries. After installation and migration, there is a scheduled task table in the admin background, which can be used normally. However, I recently used d...