web

问题 I have an HTML input element for positive integer numbers. I need to evaluate this input field and ensure that only proper values are inserted. function exampleFunction(event, element) { // If event is not backspace and Not a Number if (event.which != 8) { //If the event is Not a Number if (isNaN(String.fromCharCode(event.which))) { // Cancels the event event.preventDefault(); } //If the length reached the limit else { var value = document.getElementById(element.id).value; var maxLength =

问题 I currently learning Angular 5 and I'm having difficulty on passing data from a service to a component. I'm integrating this to wordpress.. here's my current code: orderers.component.ts import { Component, OnInit } from '@angular/core'; import { HttpClient, HttpHeaders } from '@angular/common/http'; @Component({ selector: 'app-orderer', templateUrl: './orderer.component.html', styleUrls: ['./orderer.component.css'] }) export class OrdererComponent implements OnInit { o_manual:boolean = false;

问题 I have a simple site example.com and an external file link. I want this scenario to be implemented: Once a user visits example.com, a file from an external link is automatically downloaded. Mind that I don't want a user to click some link, but just an immediate file download once the site is visited. Thus <a href="link/to/file" download>Download</a> is not what I need. Thanks in advance. 回答1: Simply create a link and click on it via js: <script> window.onload = function(){ var a = document

问题 I have a simple site example.com and an external file link. I want this scenario to be implemented: Once a user visits example.com, a file from an external link is automatically downloaded. Mind that I don't want a user to click some link, but just an immediate file download once the site is visited. Thus <a href="link/to/file" download>Download</a> is not what I need. Thanks in advance. 回答1: Simply create a link and click on it via js: <script> window.onload = function(){ var a = document

问题 Context : I am working on a webapp that has to display some fairly complicated and constantly updating (multiple times per second) SVG images. The updates stem from a seperate server and the SVG is updates as soon as an update is received by the web frontend. The webapp is written in Scala.js and the image is created using the d3js library (see also: scala-js-d3). We currently only support Google Chrome. Problem : Once the webapp has been in a background tab for a while, the whole site gets

问题 Context : I am working on a webapp that has to display some fairly complicated and constantly updating (multiple times per second) SVG images. The updates stem from a seperate server and the SVG is updates as soon as an update is received by the web frontend. The webapp is written in Scala.js and the image is created using the d3js library (see also: scala-js-d3). We currently only support Google Chrome. Problem : Once the webapp has been in a background tab for a while, the whole site gets

问题 Have seen a couple of answers online but there are no clear explanations and the solutions don't work. So this is what I am trying to do: I have a folder of MANY images (thousands) - currently it is saved under src/assets/images folder Given a list of images for example as input, I want to render these images dynamically . And not import all because it would be impossible given the insane number of images This is my current way of implementing it ( which does not work ): // for example const

问题 I am trying to work on a web transition which starts with inset box-shadow to ends at outer box-shadow. The below jsfiddle shows the example.The problem is normal inset to none box-shadow web-transition works but inset to outer doesn't work. http://jsfiddle.net/xq4qc/ HTML <div class="greyrow"> good transition </div> <br/> <br/> <div class="whiterow"> no transition </div> CSS .greyrow{ height:100px; width:250px; padding:10px; border:1px solid #CCCCCC; margin-bottom: 10px; -moz-box-shadow:

问题 I am trying to work on a web transition which starts with inset box-shadow to ends at outer box-shadow. The below jsfiddle shows the example.The problem is normal inset to none box-shadow web-transition works but inset to outer doesn't work. http://jsfiddle.net/xq4qc/ HTML <div class="greyrow"> good transition </div> <br/> <br/> <div class="whiterow"> no transition </div> CSS .greyrow{ height:100px; width:250px; padding:10px; border:1px solid #CCCCCC; margin-bottom: 10px; -moz-box-shadow:

问题 I have a html5 page with var connection = new WebSocket('ws://foo.bar:8888'); But I get an error Mixed Content: The page at 'https://foo.bar/' was loaded over HTTPS, but attempted to connect to the insecure WebSocket endpoint 'ws://foo.bar:8888/'. This request has been blocked; this endpoint must be available over WSS. I understand that, but I can't serve a Secure Websocket. Is there any way to make this work, except starting chrome with --allow-running-insecure-content or something like that