Develop Reference

Vue component get and set conversion with imask.js

I am trying to use iMask.js to change 'yyyy-mm-dd' to 'dd/mm/yyyy' with my component however when I am setting the value I think it is taking the value before the iMask has finished. I think using maskee.updateValue() would work but don't know how to access maskee from my component.
I am also not sure if I should be using a directive to do this.
Vue.component("inputx", {
template: `
<div>
<input v-mask="" v-model="comp_date"></input>
</div>
`,
props: {
value: { type: String }
},
computed: {
comp_date: {
get: function () {
return this.value.split("-").reverse().join("/");
},
set: function (val) {
const iso = val.split("/").reverse().join("-");
this.$emit("input", iso);
}
}
},
directives: {
mask: {
bind(el, binding) {
var maskee = IMask(el, {
mask: "00/00/0000",
overwrite: true,
});
}
}
}
});
var app = new Vue({
el: "#app",
data: {
date: "2020-12-30"
}
});
<script src="https://cdn.jsdelivr.net/npm/vue#2.6.12"></script>
<script src="https://unpkg.com/imask"></script>
<div id="app">
<inputx v-model="date"></inputx>
Date: {{date}}
</div>

The easiest way you can achieve this is by installing the external functionality on the mounted hook of your Vue component, instead of using a directive.
In this way you can store the 'maskee' object on your component's data object to later access it from the setter method.
Inside the setter method you can then call the 'updateValue' method as you hinted. Then, you can extract the processed value just by accessing the '_value' prop of the 'maskee' object.
Here is a working example:
Vue.component("inputx", {
template: `
<div>
<input ref="input" v-model="comp_date"></input>
</div>
`,
data: {
maskee: false,
},
props: {
value: { type: String },
},
computed: {
comp_date: {
get: function () {
return this.value.split("-").reverse().join("/");
},
set: function () {
this.maskee.updateValue()
const iso = this.maskee._value.split("/").reverse().join("-");
this.$emit("input", iso);
}
}
},
mounted(){
console.log('mounted');
const el = this.$refs.input;
this.maskee = IMask(el, {
mask: "00/00/0000",
overwrite: true,
});
console.log('maskee created');
}
});
var app = new Vue({
el: "#app",
data: {
date: "2020-12-30"
}
});
<script src="https://cdn.jsdelivr.net/npm/vue#2.6.12"></script>
<script src="https://unpkg.com/imask"></script>
<div id="app">
<inputx v-model="date"></inputx>
Date: {{date}}
</div>

Vue js. Data fields not binding

I have the following definition for the Vue element:
new Vue({
el: "#app",
data: {
latitude1: 'a',
name: 'aa'
},
mounted() {
if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(position => {
this.latitude1 = position.coords.latitude;
})
} else {
this.latitude1 = "WTF??"
// this doesn't work either:
// this.$nextTick(() => { this.latitude1 = "WTF??" })
}
},
methods: {
// button works... WTF?!?
doIt() {
this.latitude1 = "WTF??"
}
}
});
<script src="https://cdn.jsdelivr.net/npm/vue#2.5.16/dist/vue.js"></script>
<div id="app">
<div>{{ latitude1 }}: {{ name }}</div>
<button #click="doIt">Do it</button>
</div>
I can see the location data being populated. The alert displays the latitude but the 2 way binding for the data field latitude1 is not working.
I have tried storing the object state using this and that also did not work.
My html is as follows:
<div class="form-group" id="app">
<p>
{{latitude1}}
</p>
</div>

One of the things to do inside the Vue.js is to use the defined methods for reactive properties changes.
Here is a code I've provided for it:
function error(err) {
console.warn(`ERROR(${err.code}): ${err.message}`);
}
var options = {
enableHighAccuracy: true,
timeout: 5000,
maximumAge: 0
};
new Vue({
el: "#app",
data: {
latitude1: 'a',
name: 'aa'
},
mounted: function() {
if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(position => {
console.log(position.coords.latitude);
Vue.set(this, 'latitude1', position.coords.latitude);
}, error, options)
}
}
});
I also set error handler and options for the navigator query. For following the results please check the console.

Vue.js global event not working

I've got
<component-one></component-one>
<component-two></component-two>
<component-three></component-three>
Component two contains component three.
Currently I emit an event in <component-one> that has to be caught in <component-three>.
In <component-one> I fire the event like this:
this.$bus.$emit('setSecondBanner', finalBanner);
Then in <component-three> I catch it like this:
mounted() {
this.$bus.$on('setSecondBanner', (banner) => {
alert('Caught');
this.banner = banner;
});
},
But the event is never caught!
I define the bus like this (in my core.js):
let eventBus = new Vue();
Object.defineProperties(Vue.prototype, {
$bus: {
get: () => { return eventBus; }
}
});
What could be wrong here? When I check vue-dev-tools I can see that the event has fired!

This is the working example for vue1.
Object.defineProperty(Vue.prototype, '$bus', {
get() {
return this.$root.bus;
}
});
Vue.component('third', {
template: `<div> Third : {{ data }} </div>`,
props:['data']
});
Vue.component('second', {
template: `<div>Second component <third :data="data"></third></div>`,
ready() {
this.$bus.$on('setSecondBanner', (event) => {
this.data = event.data;
});
},
data() {
return {
data: 'Defautl value in second'
}
}
});
Vue.component('first', {
template: `<div>{{ data }}</div>`,
ready() {
setInterval(() => {
this.$bus.$emit('setSecondBanner', {
data: 'Bus sending some data : '+new Date(),
});
}, 1000);
},
data() {
return {
data: 'Defautl value in first'
}
}
});
var bus = new Vue({});
new Vue({
el: '#app',
data: {
bus: bus
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/1.0.28/vue.js"></script>
<div id="app">
<second></second>
<first></first>
</div>

Have you tried registering the listener in created instead of mounted?
Also, why define the bus with defineProperties and not simply:
Vue.prototype.$bus = new Vue();

I am trying to declare getTemp variable global so that i can use it in other function. VUE.JS

I am trying to declare getTemp variable global so that i can use it in other function. VUE.JS
var weather = new Vue({
el: '#weather',
data: {
getTemp: []
},
created: function () {
this.fetchData();
},
methods: {
fetchData: function () {
this.$http.get('https://vt')
.then(response => {
this.getTemp = response.data;
})
}
},
})
;

Root instance data properties are accessible throughout the app with this.$root.variableName:
new Vue({
el: '#app',
data: {
getTemp: 'Hello World!'
},
components: {
'child1': {
template: `<div><p>child1, getTemp: {{ $root.getTemp }}</p>
<subchild></subchild>
</div>`,
components: {
'subchild': {
template: `<span>Subchild test: {{ $root.getTemp }}</span>`
}
}
},
'child2': {
template: `<p>child2, getTemp: {{ $root.getTemp }}</p>`
}
}
});
<script src="https://unpkg.com/vue/dist/vue.js"></script>
<div id="app">
<child1></child1>
<child2></child2>
</div>

Update dynamic MathJax with Vuejs 2?

P.S: Now i know how to fix this. bind data with v-html
<div id="app">
<h1 v-html="math"></h1>
<button #click='change'>Change</button>
</div>
var vm = new Vue({
el: '#app',
data: function() {
return {
math: '`sum`'
}
},
methods : {
change : function() {
this.math = '`a '+Math.floor((Math.random() * 10) + 1)+'`';
this.$nextTick(function() {
MathJax.Hub.Queue(["Typeset", MathJax.Hub]);
});
}
}
})
When i update data, it duplicate element ???
I dont know why, how to update MathJax with vuejs 2 ?
This is my app: Image
var vm = new Vue({
el: '#app',
data: function() {
return {
math: 'sum'
}
},
methods : {
change : function() {
this.math = 'sum_'+Math.floor((Math.random() * 10) + 1);
this.$nextTick(function() {
MathJax.Hub.Queue(["Typeset", MathJax.Hub]);
});
}
}
})

You could replace the entire contents of the MathDiv element and call MathJax.Hub.Typeset(), but there is a more efficient approach, which is to ask MathJax for the element jax for the mathematics, and call its method for replacing the formula shown by that element. So the updated code will look like:
<div id="app">
<h1 >{{ math }}</h1>
<button #click='change'>Change</button>
</div>
<script>
var vm = new Vue({
el: '#app',
data: function() {
return {
math: '`sum_1`'
}
},
mounted: function () {
this.$nextTick(function () {
MathJax.Hub.Typeset()
})
},
methods : {
change : function() {
this.math = 'sum_'+Math.floor((Math.random() * 10) + 1);
this.$nextTick(function() {
var math = MathJax.Hub.getAllJax("MathDiv")[0];
MathJax.Hub.Queue(["Text", math, this.math]);
});
}
}
})
</script>
Refer: http://docs.mathjax.org/en/latest/advanced/typeset.html#manipulating-individual-math-elements
OR
You could use v-html to bind the data to the element.