frontend

问题 I have a react app with a pretty large build size, it is deployed on an Nginx server with SSL. I learned a bit about GZip and how it can improve the site's performance. But I also came to know that it is not to safe to use GZip with SSL. GZip is enabled for HTML files by default in Nginx. Should I enable it for other files like Javascript and CSS as well to improve performance ? 回答1: When you say it is not to safe to use GZip with SSL i assume that you are talking about Breach Attack. Well

问题 I'm about discovering SweetAlert in the official link , so i wanted to use it in my app angular5 . i have installed it this way : npm install sweetalert --save I have imported it in my component : edit-client.component with this : import swal from 'sweetalert'; Here is the file editClient.component.ts where i tried to use it : import swal from 'sweetalert'; Component({ selector: 'app-edit-clients', templateUrl: './edit-clients.component.html', styleUrls: ['./edit-clients.component.scss'] })

问题 I would like to load more searching results when scrolling down the page. I work with google API book and I would like to load just 10 searching results and if user scroll to the last search element than next 10 results load automatically. How to do that? I need a code example how proper solution should look like. Thanks for help. My App.js file is as follow: import React, { useState } from "react"; import axios from "axios"; import './App.css'; import 'bootstrap/dist/css/bootstrap.min.css';

问题 It's my first time using react native and I want to move to another screen (slide2), I have an error which reads "Undefined is not an object (evaluating navigation.navigate)" I am kind of stuck, this is how far I have gone. Please also explaining a bit will be very much appreciated and showing me what to add and where, thank you slideOne.js page code import 'react-native-gesture-handler'; import {NavigationContainer} from '@react-navigation/native'; import {createStackNavigator} from '@react

问题 I can't make a component delete itself with angular. I am currently learning angular and started a small greeting project for the start. How the App should work: Type your name Child component is created that is greeting you. Child component contains button to delete itself Currently i fulfilled the first two steps and everything works fine. But i have no idea how i can make the child component delete itself. Coming from React i know, that there was the possibility to delete a "component"

问题 According to react document, useEffect will trigger clean-up logic before it re-runs useEffect part. If your effect returns a function, React will run it when it is time to clean up... There is no special code for handling updates because useEffect handles them by default. It cleans up the previous effects before applying the next effects... However, when I use requestAnimationFrame and cancelAnimationFrame inside useEffect , I found the cancelAnimationFrame may not stop the animation

问题 I have a video with two versions, SD and HD, which is used to compare different qualities of a certain video file. Here is the snippet: <div className={`video__switch ${isObscured ? "" : "is-obscured"}`}> <button className={`video__switch__value u-type--sans u-type--delta u-slant ${isHD ? "" : "active"}`} onClick={this.handleIsSD.bind(this)}> <span className="u-unslant u-type--bold">SD</span> </button> <button className={`video__switch__value u-type--sans u-type--delta u-slant ${isHD ?

问题 I have a video with two versions, SD and HD, which is used to compare different qualities of a certain video file. Here is the snippet: <div className={`video__switch ${isObscured ? "" : "is-obscured"}`}> <button className={`video__switch__value u-type--sans u-type--delta u-slant ${isHD ? "" : "active"}`} onClick={this.handleIsSD.bind(this)}> <span className="u-unslant u-type--bold">SD</span> </button> <button className={`video__switch__value u-type--sans u-type--delta u-slant ${isHD ?

问题 For the website that I am managing, I am handling the iPhone X family screen safe area using the new safe-area-inset-<position> and this is working fine on Safari browser as you can see here: With the following code: /* white container for the home bar that has an height only on devices that read the safe area to cover the transparency around that bar */ .ctc-container { background: $white; display: block; position: fixed; left: 0; right: 0; bottom: 0; width: 100%; min-height: env(safe-area

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 28 days ago . We are trying to develop a workflow, utilizing React react-sketchapp Sketch, that a designer in Sketch can produce React components and the coding (at least for the CSS) is automatically generated and configurable. There doesn't seem to be a lot of documentation and/or support. We