I want to change count variable every click. If i put "count++" in the on:clik event, it work. But, when i want to use a function doesn't do anythig.
I also tried to put the component and the "new view" in the same file js, but doesn't work and show a blank page,why? thanks
Prova.js
Vue.component('prova', {
data: function () {
return {
count: 0
}
},
template: '<div><button v-on:click="Add">You clicked me {{ count }} times.</button></div>',
methods:{
Add: function(){
prova.count++;
}
}
});
index.html:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>prova component</title>
<script src="https://cdn.jsdelivr.net/npm/vue#2.6.14/dist/vue.js"></script>
<script type="text/javascript" src="Prova.js"></script>
</head>
<body>
<section id="prova">
<prova ></prova>
<script>
new Vue({
el: "#prova",
})
</script>
</section>
</body>
</html>
Actually I don't know what your second component is used to be, but you can solve your problem like this:
In the template
<template>
<div>
<button #click="addCount()"></button>
<div>You have clicked the button {{count}} times.</div>
</div>
</template>
• #click is the same like v-on:click
• you should write it like following: addCount()
In the script:
export default {
data() {
return {
count: 0,
}
},
methods: {
addCount() {
this.count += 1;
}
}
}
• define count in your data
• use methods and on every click on your button add 1 to the current value
This should solve your problem. Please give me a short feedback if this worked out for you!
For little testing: You can also subtract from count. Just create a second button and make another click event an there you use this.count -= 1. This will subtract 1 each time you click it.
Related
I'm trying to get data from parent component and use them in child component v-bind:style.
Here's my code.
<body>
<div id="parentComponent">
<child-component v-bind:propsdata="parentBackground" v-bind:propsdata2="parentFontstyle"></child-component>
</div>
<script>
Vue.component('child-component', {
props: ['propsdata', 'propsdata2'],
data: function() {
return {
childBackground: this.propsdata,
childFontStyle: this.propsdata2
},
template: '<p v-bind:style="childBackgroundColor, childFontStyle">Child componnent Area</p>'
});
new Vue ({
el: '#parentComponent',
data: function() {
return {
parentBackground: 'background-color:yellow;',
parentFontStyle: 'font-style: italic;'
},
})
</body>
When I run this code, only second style(childFontStyle) is applied to Child componnent template.
I also tried v-bind:style="[childBackgroundColor, childFontStyle]" and doesn't work.
Is there any way to apply both style?
You need to pass the props property as an object and can able to bind the props directly to the child. You have some typo mistakes that need to be fixed as well. Here is the working snippet.
<!DOCTYPE html>
<html lang="en">
<head>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</head>
<body>
<div id="parentComponent">
<child-component v-bind:propsdata="parentBackground" v-bind:propsdata2="parentFontStyle"></child-component>
</div>
<script>
Vue.component("child-component", {
template: `<p v-bind:style="[propsdata, propsdata2]">Child componnent Area</p>`,
props: ["propsdata", "propsdata2"]
});
new Vue({
el: "#parentComponent",
data: function() {
return {
parentBackground: {
"background-color": "yellow"
},
parentFontStyle: {
"font-style": "italic"
}
};
}
});
</script>
</body>
</html>
I have a component which is mounted as part of the DOM rendering. The skeleton of the application is
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>title</title>
</head>
<body>
<div id="app">
<my-component></my-component>
<button>press this button to reload the component</button>
</div>
</body>
</html>
<my-component> is functional (it displays a few form inputs) and $emit data to the parent.
Is there a way to re-mount it? The goal is to have a component content and setup as if it was just rendered for the first time (including a reset of the data() elements which hold its state).
There are some solutions to that but they all assume a rewrite of data(), which I would like to avoid.
My understanding is that a component is actuall HTML/CSS/JS code injected in the dom in the right place during the rendering so I fear that the concept of "re-mounting" it does not exist - I just wanted to make sure before going the data()-rewrite way.
The trick is to alter the key
When the key changes, vue regards it as a new component, so it will unmount the "old" component, and mount a "new" component.
See example, the created() hook will only run once, so if you see the value change, you're seeing a brand new object.
example:
Vue.component('my-component', {
template: `<div>{{ rand }}</div>`,
data() {
return {
rand: ''
}
},
created() {
this.rand = Math.round(Math.random() * 1000)
}
});
new Vue({
el: '#app',
data: {
componentKey:0
}
})
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.8/vue.min.js"></script>
<div id="app">
<my-component :key="componentKey"></my-component>
<button #click="componentKey=!componentKey">press this button to reload the component</button>
</div>
In your template you'll add the v-if directive:
<template>
<my-component v-if="renderComponent" />
</template>
In your script you'll add in this method that uses nextTick:
<script>
export default {
data() {
return {
renderComponent: true,
};
},
methods: {
forceRerender() {
// Remove my-component from the DOM
this.renderComponent = false;
this.$nextTick(() => {
// Add the component back in
this.renderComponent = true;
});
}
}
};
</script>
This is what's going on here:
Initially renderComponent is set to true, so my-component is rendered
When we call forceRerender we immediately set renderComponent to false
We stop rendering my-component because the v-if directive now evaluates to false
On the next tick renderComponent is set back to true
Now the v-if directive evaluates to true, so we start rendering my-component again
js i'm starting to catch up on it but i'm stuck on components would appreciate your help thanks
//here is my js
Vue.component('thatsCool', {
template: document.querySelector('#myOwnTemplate'),
data: function() {
return {
helloWorld: 'thats cool',
};
},
});
new Vue({
el: 'body',
});
//and this is my html
<! DOCTYPE html>
<html>
<head>
<title>playing with Vue components</title>
</head>
<body>
<thatsCool></thatsCool>
<script id="myOwnTemplate" type="x/template">
<p v-text="helloWorld"></p>
</script>
<script src="vue.js"></script>
<script src="component.js"></script>
</body>
</html>
There are a couple of errors in your code. Use dash-separated convention for your components and simple handlebar notation for string output. Try with this code:
HTML
<thats-cool></thats-cool>
<script id="myOwnTemplate" type="x-template">
<p>{{ helloWorld }}</p>
</script>
JS
Vue.component('thats-cool', {
template: '#myOwnTemplate',
replace : true,
data: function() {
return {
helloWorld: 'thats cool',
};
}
});
Note that the option 'replace : true' replaces the original template's content of el instead of appending to it.
Ello!
I have an app bar icon and on the click event - I added a function which has the following code:
function homePage() {
WinJS.Navigation.navigate("/home/homePage.html");
}
Now I have two files - homePage.html which is inside /home/ and the js file for the same.
There's a simple button on html of id NextPage.
While in the homePage.js file, I have:
function () {
"use strict";
WinJS.UI.Pages.define("/home/homePage.html", {
ready: function (element, options) {
var button = document.getElementById("NextPage");
button.addEventListener("click", GoToNextPage);
}
});
function GoToNextPage() {
WinJS.Navigation.navigate("/default.html");
}
})();
But when I click the app bar icon - nothing happens :(
So what I plan to accomplish is that when someone clicks an appbar icon on default.html - the user switches to homePage.html (and then when I click the homePage button - it goes back) - but not even the initial page transfer is taking place.
This is embarrassing to ask but I can't just fold my hands and wait for something magical to happen. I have been working on this for an hour - read videos and samples but it's not working at all.
Would appreciate help - I can't figure out what's going wrong. Thanks!
The WinJS.Navigation namespace provides state and history management, but it doesn't actually do the navigation itself. To move from one page to another, you need to define a handler function for one of the events in the WinJS.Navigation namespace - this lets you respond to call to the WinJS.Navigation.navigate method in a way which makes sense for your app.
As a demonstration, here is a homePage.html file which has a NavBar containing a command that will be the trigger for the navigation.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>NavProject</title>
<link href="//Microsoft.WinJS.1.0/css/ui-dark.css" rel="stylesheet" />
<script src="//Microsoft.WinJS.1.0/js/base.js"></script>
<script src="//Microsoft.WinJS.1.0/js/ui.js"></script>
<link href="/css/default.css" rel="stylesheet" />
<script src="/js/homePage.js"></script>
</head>
<body>
<div id="contentTarget">
<h1>Select a page from the NavBar</h1>
</div>
<div id="navbar" data-win-control="WinJS.UI.AppBar"
data-win-options="{placement:'top'}">
<button data-win-control="WinJS.UI.AppBarCommand"
data-win-options="{id:'NextPage', label:'Next Page',
icon:'\u0031', section:'selection'}">
</button>
</div>
</body>
</html>
Along with the NavBar, I have defined the div element whose id is contentTarget. This is the place in my content where the new file will be loaded when the user clicks the NavBar command.
CLARIFICATION: All of the content that you want replaced needs to go into the contentTarget element. Otherwise you'll get a mix of old and new content displayed.
And here is the JavaScript file which wires it up (this is the homePage.js file which I added a script element for in the HTML file above):
(function () {
"use strict";
WinJS.Navigation.addEventListener("navigating", function (e) {
var elem = document.getElementById("contentTarget");
WinJS.UI.Animation.exitPage(elem.children).then(function () {
WinJS.Utilities.empty(elem);
WinJS.UI.Pages.render(e.detail.location, elem)
.then(function () {
return WinJS.UI.Animation.enterPage(elem.children)
});
});
});
var app = WinJS.Application;
var activation = Windows.ApplicationModel.Activation;
app.onactivated = function (args) {
args.setPromise(WinJS.UI.processAll());
navbar.addEventListener("click", function (e) {
if (e.target.id == "NextPage") {
WinJS.Navigation.navigate("/nextPage.html");
}
}, true);
};
app.start();
})();
Notice how I have added a handler function for the WinJS.Navigation.navigating event. This event is triggered by a call to WinJS.Navigation.navigate and details of the navigation target are contained in the detail.location property of the event object.
In this example, I clear out any content in my target element and replace it with the contents of the target file and animate the transition from one to the other.
You only have to define one handler for the event. This means that if I have elements in nextPage.html that will lead to navigation, I just need to call WinJS.Navigation.navigate without needing to create a new event handler, like this:
<!DOCTYPE html>
<html>
<head>
<title></title>
<script>
WinJS.UI.Pages.define("/nextPage.html", {
ready: function () {
back.addEventListener("click", function () {
WinJS.Navigation.navigate("/homePage.html");
});
}
});
</script>
</head>
<body>
This is next page.
<button id="back">Back</button>
</body>
</html>
I donwloaded this release, and I'm trying to run an example from the docs.
After expanding the Dojo download, my dojo dir is:
js/dojo-release-1.5.0/dijit
js/dojo-release-1.5.0/dojo
js/dojo-release-1.5.0/dojox
The buttons show up, but hide button does not hide the div.
Do I need to add other Dojo libraries along with the reference to dojo.js?
<script type="text/javascript" language="JavaScript" src="/js/dojo-release-1.5.0/dojo/dojo.js"></script>
<script type="text/javascript">
dojo.require("dijit.form.Button");
dojo.addOnLoad(function() {
var node = dojo.byId("findMe");
dojo.connect(dijit.byId("buttonOne"), "onClick", function() {
dojo.fadeOut({
node: node,
duration: 300
}).play();
});
dojo.connect(dijit.byId("buttonTwo"), "onClick", function() {
dojo.fadeIn({
node: node,
duration: 300
}).play();
})
});
HTML:
<button dojoType="dijit.form.Button" id="buttonOne">
Hide Me!
</button>
<button dojoType="dijit.form.Button" id="buttonTwo">
Show Me!
</button>
<div id="findMe">
Hiya!
</div>
There are a couple of things you may be missing. As Daniel says, adding parseOnLoad=true as a djConfig param will help. Alternatively you can add djConfig params as a global JS variable before your dojo.js script tag, i.e.
<script>
var djConfig = {
parseOnLoad: true
}
</script>
A final alternative is to manually call the parser yourself. To do this, modify your JS to:
dojo.require("dijit.form.Button");
// You need to manually require the parser if you're going to call it yourself
dojo.require("dojo.parser");
dojo.addOnLoad(function() {
var node = dojo.byId("findMe");
dojo.connect(dijit.byId("buttonOne"), "onClick", function() {
dojo.fadeOut({
node: node,
duration: 300
}).play();
});
dojo.connect(dijit.byId("buttonTwo"), "onClick", function() {
dojo.fadeIn({
node: node,
duration: 300
}).play();
})
// New line, parse the doc
dojo.parser.parse();
});
Additionally to parsing, you may need to add a theme (you've not mentioned if you've done this or not). The easiest way to do this is to add the class name to your body tag and import the css.
...
<link rel="stylesheet" type="text/css" href="/js/dojo-release-1.5.0/dijit/themes/claro/claro.css">
</head>
<body class="claro">
...
</body>
http://telliott.net/dojoExamples/dojo-buttonHelloWorld.html contains an example of this all working for you, feel free to go crib.
Reading http://dojotoolkit.org/reference-guide/djConfig.html#djconfig and http://dojotoolkit.org/reference-guide/dijit/info.html#dijit-info would probably be a good idea also.
HTH.
Tom
try adding djConfig="parseOnLoad:true" when add the dojo.js to the page.
ex:
<script type="text/javascript" language="JavaScript" src="/js/dojo-release-1.5.0/dojo/dojo.js" djConfig="parseOnLoad:true"></script>
//Daniel