all how i can watch changes in my component in data?
I need watch when user choose car brand to take from server models for that brand
this is my code
Templete
<template>
<div class="category-info">
<div v-for="input in inputs.text">
<label >{{ input.placeholder}}</label>
<input type="text" id="location" :name="input.name" v-model="input.value" #click="console">
</div>
<div class="select" v-for="select in inputs.select">
<label >{{ select.placeholder }}</label>
<my-select :data="select" v-model="select.value"></my-select>
</div>
<button #click="console">click</button>
</div>
Script
<script>
export default {
name: "profile-add-inputs",
props: ['category'],
data() {
return {
inputs: {
text : {},
select: {}
},
}
},
methods: {
getCategories(){
axios.get('/profile/inputs', {
params: {
category: JSON.stringify(this.category.href)
}
})
.then((response) => {
this.inputs.text = response.data.text;
this.inputs.select = response.data.select;
for(let key in this.inputs.text){
this.inputs.text[key].value = '';
}
for(let key in this.inputs.select){
this.inputs.select[key].value = '';
if(this.category.href.sub == 'car' && this.inputs.select[key].name == 'brand'){
console.log('CAR BREND');
this.$watch.inputs.select[key].value = function () {
console.log(this.inputs.select[key].value);
}
}
}
},this)
.catch(function (error) {
console.log(error);
});
},
console(){
console.log(this.inputs.select);
}
},
watch: {
category : function () {
this.getCategories();
console.log('categoty');
},
inputs : {
handler() {
console.log('watch inputs');
}
}
}
}
So, i tried to use watch and $watch but its not working, plz give me a reason why that not work, or maybe some another way to resolve this problem
this.$watch can i create dynamiclly watchers with this stement?
The correct syntax is
watch : {
inputs : function(val, oldVal){
//val : New value
//oldVal : Previous value.
}
}
Related
I'm working on a couponcode VueJS app, in which I want to check an array with different discountcodes on matching values. Below I have an array with two discountcodes. If the button is clicked, I want to check the array for any matches. I am not sure what would be the best solution for this..
<template>
<div class="container">
<input placeholder='type discount' v-model="discountInput">
<button #click="checkDiscount">check for discount</button>
<span class="alert" v-if="discountValid">
Code juist
</span>
<span class="alert" v-if="discountInvalid">
Code onjuist
</span>
</div>
</template>
<script>
export default {
props: {
},
data: () => {
return {
discountInput: '',
discountValid: false,
discountInvalid: false,
discountCodes: [
{ code: 'discount-code-1', message: '10% discount' },
{ code: 'discount-code-2', message: '5 dollar discount' }
]
}
},
components: {
},
methods: {
checkDiscount() {
if (this.discountInput === this.discountCode) {
return true;
} else {
return false;
}
}
},
watch: {
}
}
</script>
A find should work.
checkDiscount() {
if (this.discountCodes.find(x => x.code === this.discountInput)) {
return true;
} else {
return false;
}
}
or as comments pointed out could be reduced to:
checkDiscount() {
return !!this.discountCodes.find(x => x.code === this.discountInput);
}
Try to use array some method as follows :
checkDiscount() {
return this.discountCodes.some(dis => dis.code === this.discountInput)
}
How do you guys get the text inside a p tag and store it in a variable in VueJS?
Because right now, it just displays it in a p tag but I want the text inside the p tag to be stored in a variable for later use.
Below is my html code
<b-form-input v-model="search" placeholder="Search by disease"></b-form-input>
<select v-model="selected">
<option v-for="result in filteredPeople(search)" :key="result.LONG_D" :value="{ id: result.LONG_D, text: result.ICD_C }">{{ result.LONG_D }}</option>
</select>
<p>
Value: {{selected.id}}
</p>
<b-button class="btn" variant="success" v-on:click="runAPI(search)">Search</b-button>
And this one is my JS code.
export default {
data() {
return {
results: {},
search: "",
msg: null,
selected: ""
};
},
methods: {
runAPI: function(disease) {
axios
.get("http://localhost:9000/api/disease/" + disease)
.then(response => (this.results = response.data))
.catch(error => console.log(error));
console.log(this.results);
},
filteredPeople() {
if (this.searchQuery) {
return this.results.filter(item => {
return item.LONG_D.startsWith(this.searchQuery);
});
} else {
return this.results;
}
}
}
One way would be to put a function in the tag that takes the value (it could also of course return the value so the display wouldn't change). The function could then store the value in a data or local variable and you would have it.
like so:
{{getSelectedId(selected.id)}}
anything inside {{}} is JS so you can have functions and even use logic (although not so recommended to put too much logic in template).
You can do like this .
JS CODE
export default {
data() {
return {
results: {},
search: "",
msg: null,
selected: ""
};
},
methods: {
runAPI: function(disease) {
axios
.get("http://localhost:9000/api/disease/" + disease)
.then(response => (this.results = this.filteredPeople()))
.catch(error => console.log(error));
console.log(this.results);
},
filteredPeople() {
if (this.searchQuery) {
return this.results.filter(item => {
return item.LONG_D.startsWith(this.searchQuery);
});
} else {
return this.results;
}
HTML CODE
<select v-model="selected">
<option
v-for="result in results"
:key="result.LONG_D"
:value="{{ id: result.LONG_D, text: result.ICD_C }}">{{ result.LONG_D }}</option>
</select>
I have created a settings page where users can update their email addresses. Everything worked fine but suddenly the validation is not updating anymore. Only the first change of the input field triggers validateState().
Any further changes will not trigger this function so the status of that field stays as it is.
I have compared the code with other components that use the same code and they still work fine.
I am using bootstrap-vue components for the form.
<template>
<div class="row">
<div class="col-md-12">
<b-form #submit="onSubmit">
<b-form-group :label="$t('general.email')"
label-for="settingsEmail"
:invalid-feedback="errors.first('email')">
<b-form-input id="settingsEmail"
type="text"
v-model="form.email"
:disabled="saving"
name="email"
:state="validateState('email')"
v-validate="{required: true, email: true}">
</b-form-input>
</b-form-group>
<b-button type="submit" variant="primary" :disabled="saving || !hasChanged() || errors.any()"><i class="fa fa-refresh fa-spin fa-fw" v-if="saving"></i> {{$t('general.save')}}</b-button>
</b-form>
</div>
</div>
</template>
<script>
import {UPDATE_USER} from '../config/actions'
export default {
name: 'settingsAccount',
data() {
return {
form: {},
saving: false
}
},
computed: {
user: function() {
return this.$store.getters.getUser;
}
},
created() {
this.init();
},
methods: {
init() {
this.form.email = this.user.email;
},
hasChanged() {
if(this.form.email !== this.user.email) {
return true;
}
return false;
},
onSubmit(event) {
event.preventDefault();
this.saving = true;
this.$validator.validateAll().then((result) => {
if (result) {
let data = {};
if(this.form.email !== this.user.email) {
data.email = this.form.email;
}
this.$store.dispatch(UPDATE_USER, data).then(() => {
this.saving = false;
this.$validator.reset();
}).catch(() => {
this.saving = false;
});
} else {
this.saving = false;
}
});
},
validateState(ref) {
if (this.veeFields[ref] && (this.veeFields[ref].dirty || this.veeFields[ref].validated)) {
return !this.errors.has(ref)
}
return null
},
}
}
</script>
The problem you're having is that the form data element is an empty object, so it will only trigger reactivity when the whole object changes. Either you need to change your data to be this:
data() {
return {
form: {email:''},
saving: false
}
},
Or in your init function, explicitly add the email property as reactive:
methods: {
init() {
this.$set(form,'email',this.user.email)
},
//...
If you're not clear on why, you can read the details here: https://v2.vuejs.org/v2/guide/reactivity.html
A working example (minus vuex) here: https://codesandbox.io/s/x4kp93w3o
PS, when writing questions about vue, it's very helpful to boil it down to a simpler example. Get rid of vuex, remove your translation stuff. Sometimes the answer will jump out at you once you have it as simple as possible.
I'm building a key-command resource and giving VueJS a whirl while doing so. I'm a newbie but am gaining the grasp of things (slowly...).
I want to be able to search in a global search form for key commands I'm defining as actions within sections of commands (see data example below). I would like to search through all the actions to show only those that match the search criteria.
My HTML is below:
<div id="commands">
<input v-model="searchQuery" />
<div class="commands-section" v-for="item in sectionsSearched"
:key="item.id">
<h3>{{ item.section }}</h3>
<div class="commands-row" v-for="command in item.command" :key="command.action">
{{ command.action }}
</div>
</div>
</div>
My main Vue instance looks like this:
import Vue from 'vue/dist/vue.esm'
import { commands } from './data.js'
document.addEventListener('DOMContentLoaded', () => {
const element = document.getElementById("commands")
if (element != null) {
const app = new Vue({
el: element,
data: {
searchQuery: '',
commands: commands
},
computed: {
sectionsSearched() {
var self = this;
return this.commands.filter((c) => {
return c.command.filter((item) => {
console.log(item.action)
return item.action.indexOf(self.searchQuery) > -1;
});
});
},
}
});
}
});
And finally the data structure in data.js
const commands = [
{
section: "first section",
command: [
{ action: '1' },
{ action: '2' },
{ action: '3' },
],
},
{
section: "second section",
command: [
{ action: 'A' },
{ action: 'B' },
{ action: 'C' },
]
},
]
export { commands };
I'm able to output the commands using the console.log(item.action) snippet you see in the computed method called sectionsSearched.
I see no errors in the browser and the data renders correctly.
I cannot however filter by searching in real-time. I'm nearly positive it's a combination of my data structure + the computed method. Can anyone shed some insight as to what I'm doing wrong here?
I'd ideally like to keep the data as is because it's important to be sectioned off.
I'm a Rails guy who is new to this stuff so any and all feedback is welcome.
Thanks!
EDIT
I've tried the proposed solutions below but keep getting undefined in any query I pass. The functionality seems to work in most cases for something like this:
sectionsSearched() {
return this.commands.filter((c) => {
return c.command.filter((item) => {
return item.action.indexOf(this.searchQuery) > -1;
}).length > 0;
});
},
But alas nothing actually comes back. I'm scratching my head hard.
There is a issue in your sectionsSearched as it is returning the array of just commands.
See this one
sectionsSearched() {
return this.commands.reduce((r, e) => {
const command = e.command.filter(item => item.action.indexOf(this.searchQuery) > -1);
const section = e.section;
r.push({
section,
command
});
}, []);
}
const commands = [
{
section: "first section",
command: [
{ action: '1' },
{ action: '2' },
{ action: '3' },
],
},
{
section: "second section",
command: [
{ action: 'A' },
{ action: 'B' },
{ action: 'C' },
]
},
]
const element = document.getElementById("commands")
if (element != null) {
const app = new Vue({
el: element,
data: {
searchQuery: '',
commands: commands
},
computed: {
sectionsSearched() {
var self = this;
return this.commands.filter((c) => {
// the code below return an array, not a boolean
// make this.commands.filter() not work
// return c.command.filter((item) => {
// return item.action.indexOf(self.searchQuery) > -1;
// });
// to find whether there has command action equal to searchQuery
return c.command.find(item => item.action === self.searchQuery);
});
},
}
});
}
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<div id="commands">
<input v-model="searchQuery" />
<div class="commands-section" v-for="item in sectionsSearched"
:key="item.id">
<h3>{{ item.section }}</h3>
<div class="commands-row" v-for="command in item.command" :key="command.action">
{{ command.action }}
</div>
</div>
</div>
Is that work as you wish ?
sectionsSearched() {
return this.commands.filter((c) => {
return c.command.filter((item) => {
return item.action.indexOf(this.searchQuery) > -1;
}).length > 0;
});
},
}
since filter will always return an array(empty or not) which value always is true.
There is a component that contains input[type=file].
Also, this field has an uploadFile handler, which calls the validateMessage method, which attempts to change the error. As you can see, after changing this.error it shows that everything is correct. But in div.error it is not displayed and if you look in vueDevtool, then there is also empty.
data in vueDevTools
data() {
return {
error: ''
}
},
methods: {
validateFile(file) {
if (! file.type.includes('video/')) {
this.error = 'wrong format';
console.log(this.error); // wrong format
}
},
uploadFile(e) {
const file = e.target.files[0];
this.validateFile(file);
},
}
<input type="file"
id="im_video"
name="im_video"
#change="uploadFile"
class="hidden">
<div class="error">
{{ error }}
</div>
Here is working example.
new Vue({
el:'#app',
data() {
return {
error: ''
}
},
methods: {
validateFile(file) {
console.log(file.type);
if (! file.type.includes('video/')) {
this.error = 'wrong format';
//console.log(this.error); // wrong format
}
},
uploadFile(e) {
this.error = '';
const file = e.target.files[0];
this.validateFile(file);
},
}
});
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<div id="app">
<input type="file"
id="im_video"
name="im_video"
#change="uploadFile"
class="hidden">
<div class="error">
{{ error }}
</div>
</div>
If you are using component this would help more to share data from child to parent in your case setting error from child component to parent
Vue.component('upload-file',{
template:`<div><input type="file"
id="im_video"
name="im_video"
#change="uploadFile"
class="hidden"></div>`,
data() {
return {
error: ''
}
},
methods: {
validateFile(file) {
//
if (! file.type.includes('video/')) {
vm.$emit('filerror', 'wrong format');
}
},
uploadFile(e) {
vm.$emit('filerror', '');
const file = e.target.files[0];
this.validateFile(file);
},
}
});
const vm = new Vue({
el:'#app',
mounted(){
this.$on('filerror', function (msg) {
this.error = msg;
})
},
data:{
error:''
}
});
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<div id="app">
<upload-file></upload-file>
<div class="error">
{{ error }}
</div>
</div>