EDIT
I noticed that the subscribe event must come first before and publish get called. But it will be silly to ask user to open TabOut page every time when app start.
I do not need to always reloading the TabOut page, so I need this event sort of method to do the job. Or else could've just call the reload on ionViewDidEnter().
I have 2 Tabs and 1 modal. /TabIn, /TabOut, and /ModalIn.
The Tabs page serve as data listing which display the data from database on ionViewDidLoad().
The ModalIn page serve as data entry for the user to key in and submit data. This page resides in the TabIn page and will get called when user clicked on each of the list of data.
After successfully submit the form in the ModalIn page I want to call refresh again on the TabOut page (no matter it has been loaded before or not). I tried using events publish it is not working. Below are my code.
ModalIn .ts
let headers: any = new HttpHeaders({ 'Content-Type': 'application/x-www-form-urlencoded' }),
options: any = { "username": val, formValue },
url: any = "some_url_here";
this.http.post(url, options, headers)
.subscribe((data: any) => {
if (data.status == 'success') {
this.events.publish('shouldReloadData');
} else {
}
},
(error: any) => {
console.log(error);
});
TabOut .ts
constructor(public events: Events) {
events.subscribe('shouldReloadData', () => {
// Reload the page here
console.log("should reloadddd"); // <- This is not working
});
}
Call subscribe with this keyword inside TabOut.ts.
constructor(public events: Events) {
this.events.subscribe('shouldReloadData', () => {
});
}
Related
I have a PWA which works fine both online and offline (but only with the initial files). However, the offline cache (let’s say a javascript file) is not being refreshed so whenever I am offline the old javascript file is used, but when online the new version is used.
On an iPad I can use Safari to go to the website and add the PWA to the home page.
If I then go offline, it works fine – all pages work etc.
But if I make a change to say a javascript file (something like adding an alert) and also change the version in my service worker, when I am online the change is reflected but when offline it remains at the older version
To clarify let’s say from the start, on going into a page it alerts “A1”
I then change the javascript to alert “A2” and change the version in the service worker.
If I run the app when online, sure enough the app says New Update Available and All Good (some alerts from the main.js file)
Then when I go into the actual page o the alert says “A2” – so all good.
Then go offline.
The alert still says “A1”
It seems that when online it uses the server latest files but when it tries to use cache the files are old and at the moment seem to be the original files.
I have read many sites on this with no success – some suggest it will sort itself in 24 hours. Some suggest setting the maxage of the service worker to 0 (but how do you do this?). Some say the files need renaming each time they change which seems very clunky.
The service worker is definitely working
main.js
$(document).ready(function () {
'use strict';
if ('serviceWorker' in navigator) {
navigator.serviceWorker
.register("/sw.js")
.then(res => {
console.log("service worker registered");
res.onupdatefound = () => {
const installingWorker = res.installing;
installingWorker.onstatechange = () => {
switch (installingWorker.state) {
case 'installed':
if (navigator.serviceWorker.controller){
alert("new update available");
forceReload();
}
else {
alert("all good");
}
break;
}
}
}
})
.catch(err => console.log("service worker not registered", err))
}
});
const forceReload = () =>{
console.log("ForceReload");
navigator.serviceWorker
.getRegistrations()
.then((registrations) =>{
console.log(registrations);
//alert("reg");
Promise.all(registrations.map((r) => r.unregister()))
caches.keys().then(function(names) {
for (let name of names)
caches.delete(name);
});
},
)
.then(() => {setTimeout(() => {
location.reload();
}, 500);
})
}
sw.js
let version =5; // update this to send update.
var cacheName = 'cacheV5'
var filesToCache = [
'/',
'/manifest.json',
'/index.html',
'/sales10.html',
'/getdata.html',
....
....
'/js/siteJS/sales10.js',
'/js/siteJS/getdata.js',
'/js/jquery/3.4.1/jquery.min.js',
'/js/bootstrap/bootstrap.min.js',
'/js/bootstrap/popper.min.js'
];
/* Start the service worker and cache all of the app's content */
self.addEventListener('install', function(e) {
self.skipWaiting();
e.waitUntil(
caches.open(cacheName).then(function(cache) {
return cache.addAll(filesToCache);
})
);
});
/* Serve cached content when offline */
self.addEventListener('fetch', function(e) {
e.respondWith(
caches.match(stripQueryStringAndHashFromPath(e.request.url.replace(/^.*\/\/[^\/]+/, ''))).then(function(response) {
return response || fetch(e.request);
})
);
});
function stripQueryStringAndHashFromPath(url) { //added this so when url paramerters passed grabbing the cashed js works
return url.split("?")[0].split("#")[0];
}
self.addEventListener('activate', function(event) {
event.waitUntil(
caches.keys().then(function(cacheNames) {
return Promise.all(
cacheNames.filter(function(cacheName) {
return true;
}).map(function(cacheName) {
return caches.delete(cacheName);
})
);
})
);
});
Hitting a link from a website without visiting the Homepage is not setting the values in the store.
I have made axios calls in nuxtServerInit action and have set the data in mutations. I am able to access this data everywhere in the project now but if I load a particular page from the website then the data is not shown until refreshed.
Following is store/index.js file
/* eslint-disable */
import Vuex from 'vuex'
import axios from 'axios'
const createStore = () => {
return new Vuex.Store({
state: {
organisation: Object,
},
mutations: {
setOrganisation(state, organisation){
state.organisation = organisation
},
},
actions: {
nuxtServerInit({ commit }, context){
axios.get(api-link-to-fetch-data-from-backend))
.then(res => {
commit("setOrganisation", res.data[0])
})
.catch(e => context.error(e));
}
},
getters: {
getOrganisation(state){
return state.organisation;
}
}
})
}
This data needs to be used in the navigation bar. So it is being fetched from the store in layout/default.vue in the created method like this,
created() {
this.organisation = this.$store.getters.getOrganisation;
}
As nuxtServerInit is the first function that is called in the nuxt lifecycle why is the data not being stored when any link from the website is accessed directly?
Example here:
Post
This information about the recent videos gets set after refreshing the page.
I use Firebase with VueJS (and VueRouter).
I have a problem with redirecting. I want to redirect between two pages. The first page is used for authentication and the second one for content that should only be visible to logged-in users.
My state holds the firebase user key (which will be populated through a mutation, that calls firebase):
state: {
user: { key: null }
}
The authentication page these lines:
beforeCreate() {
if (this.$store.state.user.key !== null) {
this.$router.replace('/')
}
}
And the secret page these:
beforeCreate() {
if (this.$store.state.user.key === null) {
this.$router.replace('/new')
}
}
But: the redirect from the authentication page to the secret page doesn't take place.
My Vue-dev-tools show that the user-key is set.
What could be the solution to this problem?
EDIT:
This is the mutation that calls Firebase and sets the user-key:
updateSession(state) {
auth.onAuthStateChanged((user) => {
if (user) {
state.user.key = user.uid
}
})
}
Here is the action:
UPDATE_SESSION({ commit }) {
commit('updateSession')
}
I call the action in my root component (App.vue):
beforeCreate() {
this.$store.dispatch('UPDATE_SESSION')
}
EDIT 2:
Now my routes array:
routes: [
{ path: '/', component: Secret },
{ path: '/new', component: Authentication }
]
Take a look at the Per-Route Guards section of the docs: https://router.vuejs.org/en/advanced/navigation-guards.html
You might want to try something like the below. By putting the beforeEnter guard on the route, you are telling Vue to do that first. The next argument tells VueRouter what to do next, and can redirect if needed or continue on to the original route.
beforeEnter(to, from, next) {
if (this.$store.state.user.key === null) {
next('/new')
}
}
EDIT
You may also want to try using push instead of replace
As per the conversation we had in the comments looks like you require this:
store.dispatch can handle Promise returned by the triggered action handler and it also returns Promise. See docs.
So you can setup the login action to retirn a promise like this:
a_logInUser: ({state, commit}, userInput) => {
return new Promise((resolve, reject) => {
firebase.auth().signInWithEmailAndPassword(userInput.email, userInput.paswword);
resolve();
});
}
Then in your authentication page where you tale the login input details and click the login button , set this up as the click handler of your login button
loginUser(){
this.$store.dispatch('a_logInUser', {email: this.email, password: this.password})
.then((result) => {
this.$router.replace('/');
}, (err) => {
// stay on this pageS
//handle login error
});
}
}
I have seen form file upload example in ExtJS4 and i need customize progress of the file upload.
I see waitMsg config property, but i don't want use that and i don't want use extjs 3rd party plugins.
So, how i can get simply current upload progress from upload form in extjs?
The waitMsg uses a message box with an infinitely auto-updating progress bar. So you can't just create a progressbar that displays the current upload.
You could create your own Ext.ProgressBar and estimate the upload time and when its done you set it to the max value. But I guess you don't want that.
To answer your question: You cannot simply track the current upload progress.
If you really need this user experience you can try a 3rd party component.
To quote the docs:
File uploads are not performed using normal "Ajax" techniques, that is
they are not performed using XMLHttpRequests. Instead the form is
submitted in the standard manner with the DOM element
temporarily modified to have its target set to refer to a dynamically
generated, hidden which is inserted into the document but
removed after the return data has been gathered.
To show real progress you can use onprogress callback of XMLHttpRequest:
Ext.override(Ext.data.request.Ajax, {
openRequest: function (options) {
var xhr = this.callParent(arguments);
if (options.progress) {
xhr.upload.onprogress = options.progress;
}
return xhr;
}
});
Then use like here:
Ext.Ajax.request({
url: '/upload/files',
rawData: data,
headers: { 'Content-Type': null }, //to use content type of FormData
progress: function (e) {
console.log('progress', e.loaded / e.total);
}
});
See online demo here.
buttons: [{
text: 'Upload',
handler: function () {
var form = this.up('form').getForm();
if (form.isValid()) {
form.submit({
url: '/upload/file',
waitMsg: 'Uploading your file...',
success: function (f, a) {
var result = a.result,
data = result.data,
name = data.name,
size = data.size,
message = Ext.String.format('<b>Message:</b> {0}<br>' +
'<b>FileName:</b> {1}<br>' +
'<b>FileSize:</b> {2} bytes',
result.msg, name, size);
Ext.Msg.alert('Success', message);
},
failure: function (f, a) {
Ext.Msg.alert('Failure', a.result.msg);
}
});
}
}
}]
Live demo with progress window is here
I'm building a Metro app using the single-page navigation model. On one of my pages I start an async ajax request that fetches some information. When the request returns I want to insert the received information into the displayed page.
For example:
WinJS.UI.Pages.define("/showstuff.html", {
processed: function (element, options) {
WinJS.xhr(...).done(function (result) {
element.querySelector('#target').innerText = result.responseText;
});
}
};
But how do I know that the user hasn't navigated away from the page in the meantime? It doesn't make sense to try to insert the text on a different page, so how can I make sure that the page that was loading when the request started is still active?
You can compare the pages URI with the current WinJS.Navigation.location to check if you are still on the page. You can use Windows.Foundation.Uri to pull the path from the pages URI to do this.
WinJS.UI.Pages.define("/showstuff.html", {
processed: function (element, options) {
var page = this;
WinJS.xhr(...).done(function (result) {
if (new Windows.Foundation.Uri(page.uri).path !== WinJS.Navigation.location)
return;
element.querySelector('#target').innerText = result.responseText;
});
}
};
I couldn't find an official way to do this, so I implemented a workaround.
WinJS.Navigation provides events that are fired on navigation. I used the navigating event to build a simple class that keeps track of page views:
var PageViewManager = WinJS.Class.define(
function () {
this.current = 0;
WinJS.Navigation.addEventListener('navigating',
this._handleNavigating.bind(this));
}, {
_handleNavigating: function (eventInfo) {
this.current++;
}
});
Application.pageViews = new PageViewManager();
The class increments a counter each time the user starts a new navigation.
With that counter, the Ajax request can check if any navigation occurred and react accordingly:
WinJS.UI.Pages.define("/showstuff.html", {
processed: function (element, options) {
var pageview = Application.pageViews.current;
WinJS.xhr(...).done(function (result) {
if (Application.pageViews.current != pageview)
return;
element.querySelector('#target').innerText = result.responseText;
});
}
};