Understanding props in vue.js
Solution 1
You have to bind the value to the component prop like this:
<person-container v-bind:greeting="greeting"></person-container>
Jsfiddle https://jsfiddle.net/y8b6xr67/
Answered here: Vue JS rc-1 Passing Data Through Props Not Working
Solution 2
I've updated your fiddle
<person-container :greeting="greeting"></person-container>
You need to pass props from the parent to the child on the html component.
Solution 3
You can also pass any string to "greeting" by just setting it like normal html attribute, without using v-bind directive.
<person-container greeting="hi"></person-container>
Will also work. Note that anything you pass that way will be interpreted as plain string.
<person-container greeting="2 + 2"></person-container>
Will result in "2 + 2, Chris".
More in user guide: https://vuejs.org/v2/guide/components.html#Props
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Chris Schmitz
Application engineer at Label Insight, web dev, and maker.
Updated on September 14, 2022Comments
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Chris Schmitz over 1 year
I'm working through the guide for learning vue.js, got to the section on props, and ran into a question.
I understand that child components have isolated scops and we use the props configuration to pass data into it from the parent, but when I try it out I can't get it to work.
I have the example I'm working on up on js fiddle:
var vm = new Vue({ el: '#app', // data from my parent that I want to pass to the child component data:{ greeting: 'hi' }, components:{ 'person-container':{ // passing in the 'greeting' property from the parent to the child component props:['greeting'], // setting data locally for the child data: function (){ return { name: 'Chris' }; }, // using both local and parent data in the child's template template: '<div> {{ greeting }}, {{ name }}</div>' } } });
When I run the above code, my output is only:
, Chris
The data local to the child component renders fine, but the passed in parent's data is either not coming through or is not properly rendering.
I don't see any errors in the javascript console and the template is rendering.
Am I misunderstanding how the props are supposed to be passed in?