I get some text from API then I display it. But before I display it, I need to inject or replace some variable in the text to value from variable.
Please check this out to understand what I mean:
https://jsfiddle.net/0q4ot5sw/
new Vue({
el: "#app",
data: {
text: 'Some very long text from API where I need to inject %variable%',
variable: 'some word' // How to inject this variable to the text?
}
})
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<div id="app">
{{ text }}
</div>
You can do that
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<div id="app">
{{ text.replace("%variable%", variable) }}
</div>
or that
new Vue({
el: "#app",
data: {
text: 'Some very long text from API where I need to inject %variable%',
variable: 'some word' // How to inject this variable to the text?
},
computed: {
resultText: function() {
return this.text.replace("%variable%", this.variable);
}
}
})
and use like this
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<div id="app">
{{ resultText }}
</div>
You can use computed value to do the task
new Vue({
el: '#app',
data: {
text: 'Some very long text from API where I need to inject',
variable: 'some word123' // How to inject this variable to the text?
},
computed : {
changeText : function() {
return this.text + this.variable
}
}
})
<script src="https://unpkg.com/vue"></script>
<div id="app">
<p>{{ changeText }}</p>
</div>
You can create a function (or a computed property, this decision is actually yours) and combine those two strings. Something like this
new Vue({
el: "#app",
data: {
text: 'Some very long text from API where I need to inject',
variable: 'some word'
},
methods: {
getText: function(){
return this.text + this.variable;
},
toggle: function(todo){
todo.done = !todo.done
}
}
})
On your template, you just call the function you created
<div id="app">
{{ getText() }}
</div>
Related
Below is my code in vue.js where I trying to display the out put in list type like. if user give out put in the form of comma separated.
vue.js,angular,react.js
Then I want the out put in this format
vue.js
angular
react.js
This I have implemented in JavaScript but trying to achieve in vue.js please help me to complete this
This is the updated code please tell me where I am going wrong
<html>
<head>
<script src="https://cdn.jsdelivr.net/npm/vue#2/dist/vue.js"></script>
</head>
<body>
<div id="demo">
<span v-for="(string, index) in lists">
<span>{{string}}</span><span v-if="index+1 < lists.length">, </span>
</span>
</div>
<script>
var demo = new Vue({
el: '#demo',
data: function() {
return {
string: ''
};
},
computed: {
lists: function(){
return this.string.split(",");
}
}
})
</script>
</body>
</html>
You could use a computed property for this in combination with split:
var demo = new Vue({
el: '#demo',
data: function() {
return {
string: ''
};
},
computed: {
lists: function(){
return this.string.split(",");
}
}
})
I tried to show particular string using v-text. But it shows nothing.
Tried code
ccc.handlebars
<div id="app">
<div class="input-group mb-3">
<input type="text" class="form-control" v-text="getValues[0].value">
</div>
</div>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<script>
var app = new Vue({
el: '#app',
data: {
'bulk': {{{bulks}}}
},
computed: {
getValues: function() {
return this.bulk;
}
},
methods: {},
});
</script>
getValues retuens JSON
[
{ name: "Dauth", age: "18", value: "TGFR123" }
]
I want to show TGFR123 in the text box
Above getValues returns the correct JSON. But v-text="getValues[0].value" not shows the string. Help me to solve this.
v-text does not work on input.
If you want to set the value of an input use :value or v-model
var app = new Vue({
el: '#app',
data: {
bulk: [{
name: "Dauth",
age: "18",
value: "TGFR123"
}]
},
computed: {
getValues: function() {
return this.bulk;
}
},
})
<script src="https://cdn.jsdelivr.net/npm/vue#2.6.0"></script>
<div id="app">
Bind : <input type="text" :value="getValues[0].value">
v-model : <input type="text" v-model="getValues[0].value">
<div>Result : {{getValues[0].value}}</div>
</div>
With v-model the data will be changed with the user input
v-text
value binding
You can use v-model or v-bind:value to insert this value in your input
var app = new Vue({
el: '#app',
data: {
bulk: [{id: 123, name: "Test", value: "NerF21_346"}]
},
computed: {
getValues() {
return this.bulk[0].value
}
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div id="app">
<input type="text" v-model="getValues">
</div>
v-model documentation
I use a Form object to handle all my input fields and validation/errors etc.
new Vue({
el: '#root',
data: {
form: { trainer: '' }
}
And I can use it as v-model like this:
<input v-model='form.trainer' name='trainer'>
I would like to make the form an instance property, because I have to pass it to all my components at the moment.
Vue.prototype.$form = {trainer: ''}
new Vue({ el: '#root' });
However, its not reactive anymore:
<input v-model="$form.trainer">
<span v-text="$form.trainer"></span>
Changes to the input are not reflected on the span.
Is there a solution to use a instance property as v-model?
Using Global Mixin:
You can use Global Mixin and then add form: { trainer: '' } to it and then this option will be available in every Vue instance created afterwards like:
// inject a handler for `myOption` custom option
Vue.mixin({
data: function () {
return {
form: { trainer: '' }
}
}
})
and then you can use it like normal component data option:
<input v-model="form.trainer">
<span v-text="form.trainer"></span>
Demo:
// inject a handler for `myOption` custom option
Vue.mixin({
data: function() {
return {
form: { trainer: '' }
}
}
})
// Define a new component called trainer
Vue.component('trainer', {
template: `<div>
<input v-model="form.trainer">
<span v-text="form.trainer"></span>
</div>
`
})
new Vue({
el: "#myApp",
})
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.min.js"></script>
<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" rel="stylesheet">
<div id="myApp">
<trainer></trainer>
<trainer></trainer>
</div>
Demo #2:
var trainer2Data = {
form: { trainer: '' }
}
Vue.mixin({
data: function() {
return trainer2Data;
}
})
// Define a new component called trainer2
Vue.component('trainer2', {
template: `<div>
<input v-model="form.trainer">
<span v-text="form.trainer"></span>
</div>
`
})
new Vue({
el: "#myApp",
})
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.min.js"></script>
<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" rel="stylesheet">
<div id="myApp">
<trainer2></trainer2>
<trainer2></trainer2>
</div>
I understand how this works from the VueJS Documentation:
<div id="components-demo">
<button-counter></button-counter>
</div>
And also this:
<div id="app">
<a v-on:click="loadElement(request, etc)">Load</a>
</div>
Is there any way to write the equivalent from a function and have Vue pick it up? For example as this:
<div id="app">
{{ writeComponent('component-name', etc) }}
or
{{ writeElement('loadElement') }} <!-- which then writes the component above -->
</div>
The reason for this is that in this context quite a few components might need to be written and writing it out in HTML would be cumbersome.
You could use the render function like below:
Vue.component('button-counter', {
template: '<span class="bc">bc</span>'
})
new Vue({
el: '#app',
data: {
request: 'req!',
etc: 'etc!',
buttonCounters: []
},
methods: {
loadElement(r, e) {
console.log('loadElement', r, e);
this.buttonCounters.push(r);
}
},
render(h) {
let bcs = this.buttonCounters.map(bc => h('button-counter'));
let loadLink = h('a', {on: {"click": ($event) => { this.loadElement(this.request, this.etc)}}}, ["Load"]);
return h('div', {attrs: {"id": "app"}}, [loadLink, " ", ...bcs])
}
})
<script src="https://unpkg.com/vue"></script>
<div id="app"></div>
Though the same can be achieved via regular template and v-for:
Vue.component('button-counter', {
template: '<span class="bc">bc</span>'
})
new Vue({
el: '#app',
data: {
request: 'req!',
etc: 'etc!',
buttonCounters: []
},
methods: {
loadElement(r, e) {
console.log('loadElement', r, e);
this.buttonCounters.push(r);
}
}
})
<script src="https://unpkg.com/vue"></script>
<div id="app">
<a v-on:click="loadElement(request, etc)">Load</a>
<button-counter v-for="(bc, index) in buttonCounters" :key="index"></button-counter>
</div>
I have got Vue-JS app. After use click variable rasters_previews_list get new data. I would like to generate list with them. I can't understand which directive I should use to handle this even.
Here is my code:
var userContent = Vue.extend({
template: `
<div class="LayersMenuSectionContent" v-if="rasters_previews_list.length">
<ul v-for="img in rasters_previews_list">
<li>{{img.id}}</li> // generate list here
<ul>
</div>
`,
data: function () {
return {
rasters_previews_list: [] // when come new data I should generate li with then
}
},
ready: function()
{
},
methods:
{
}
});
Should I use v-on or v-if?
When rasters_previews_list is changed, list is autorendered in v-for.
new Vue({
el: '#app',
template: `
<div class="LayersMenuSectionContent" v-show="rasters_previews_list.length">
<ul v-for="img in rasters_previews_list">
<li>{{img.id}}</li>
<ul>
</div>
<button #click="add">Add</button>
`,
data: function () {
return {
rasters_previews_list: [] // when come new data I should generate li with then
}
},
ready: function(){ },
methods: {
add(){
this.rasters_previews_list.push({id: 'hello'},{id: 'world'});
}
}
});
<script src="//cdnjs.cloudflare.com/ajax/libs/vue/1.0.26/vue.min.js"></script>
<div id="app"></div>
Extra: You must use v-show instead of v-if for this case