frontend

问题 This is my parent component template fragment: <button type="button" (click)="addModal.show();">Add</button> <add-modal #addModal></add-modal> And this is my modal component: Component({ selector: 'card-add-modal', template: ` <div *ngIf="isShowModal" bsModal #addModal="bs-modal" [config]="{show: true, backdrop: 'static'}" (onHidden)="onHidden()" class="modal fade"> <!-- header... --> <div class="modal-body"> <input type="text" name="name" id="name" [(ngModel)]="model.test"> </div> <!--

问题 I am building a game that players can attack each other by turn. So first I set the name , job manually and generate life , damage , magic randomly in componentWillMount() . I hope that every time I submit the attack form, certain amount of life with be reduced from the attacked person. But now every time I submit, the whole state is regenerated(with all kinds of bugs). Can I do something to solve it? app.js : https://ghostbin.com/paste/ype2y attack.js : https://ghostbin.com/paste/wzm3m 回答1:

问题 I have: var myAbc = { 0: true, 1: false, 2: true }; and i want to change de keys like: var myAbc = { key1: true, key2: false, key3: true }; i have already tried this: for (var key in array) { key = value; } but did not change the key of the array out side of the for, any help? 回答1: If you can use es6, you can do this in one line: var myAbc = { 0: true, 1: false, 2: true }; var renamed = Object.keys(myAbc).reduce((p, c) => { p[`key${Number(c)+1}`] = myAbc[c]; return p; }, {}) console.log

问题 In the bootstrap grid system, there are 12 columns and col - *- * class is used to group together certain number of columns. But when I want to use the first 3 columns and then just the last column how do I do that, that is, how can I use certain columns and not others in a single row class? Like when I make a page header, I give the title on the left hand side and certain other text on the right side of the header, I assume I can use the grid system here effectively, given that I can access

问题 I have a menu with their own submenus too. Problem: When the page is loaded, the website emits a letter S at the end of every submenu . How can i remove that letter S at the end of every submenu via JQuery or CSS? This is the current markup when I copy html node in firebug: <nav class="shopMenuHover"> <div id="bx_incl_area_5_1"> <ul> <li class=""><a href="#" class="firstLevel"><font><font>Main Menu 1</font></font></a> <div class="shopSubmenuHover" style=""><h2><a href="#"><font><font>Sub Menu

问题 While designing a Web Application in ASP.Net, I usually split the project in 2 parts, the back-end (the admin part) and the front-end (the visitors/SEO part). Let's say that my visitors can login on the website and will do a lot of tasks, like fill profile, send messages, etc. That part (authenticated user) looks for me a differente "layer" between Front-end and Back-end, and is somewhat hard define if is front-end (why visitors/users will handle it, but no admins) or if it is back-end (why

问题 I'm trying to create a jpeg file from raw data in javascript I've been using the google file picker api to allow users to select their images from drive and import into my application, but when I make the request to download the image google responds with raw data that looks like this: Google's response I have tried placing that data into a blob with: var blob = new Blob([res.text], {type: 'image/jpeg'}) I have also tried placing the data into a file. var file = new File([res.text], 'image

问题 We have a problem with showing in browser (actually Chrome) binary images receiving from REST backend API. The backend REST endpoint defined in Java like this @GetMapping(path = "/images/{imageId:\\d+}/data", produces = MediaType.APPLICATION_OCTET_STREAM_VALUE) public @ResponseBody byte[] getImageData(@PathVariable long imageId) { return ... skipped ... } On the frontend we do these steps: request image data via fetch JS method call async function getImage(id) { return await fetch(`${URL}

问题 table.component.html When I click on the Header, the function have to sort ASC/DESC all the column. <table> <tr> <th *ngFor="let col of columns" (click)="sortTable(col)">{{col}}</th> </tr> <tr *ngFor="let user of users"> <td *ngFor="let col of columns">{{user[col]}}</td> </tr> </table> table.component.ts The method sortTable(param) work just ASC and I can't click on the same Header again for the DESC so it remain the same until I click on another Header. export class DynamicTableComponent

问题 Below is a login component without hooks. This component has two input fields and a submit button. How can we modify this component to use hooks and convert this component into a functional component that can use states? import React from 'react'; import { userService } from '../services/user.services'; class Login extends React.Component { constructor(props) { super(props); this.state = { username: '', password: '', submitted: false, loading: false, error: '' } this.handleChange = this