I have to build a quiz/survey app in vue.js, I'm pretty new to vue and still trying to learn it. I have a quiz/survey that asks different questions depending on what the user answers in the initial question.
so if the user picks yes it will display question 2 if the user picks no it will display question 3 etc.
I'm not sure what the best way of going around it but so far I have this.
Is there anyway i can use the value of my answer as the questionIndex after a person clicks next?
JS file:
"use strict";
let quiz = {
title: "Asbestos Quiz",
questions: [
{
text: 'Do you need help with an Asbestos Survey?',
answers: [
{
text: "Yes",
value: '2'`enter code here`
},
{
text: "No",
value: '3'
},
]
},
{
text: 'Was your property constructed pre 2000',
answers: [
{
text: "Yes",
value: '4'
},
{
text: "No",
value: '5'
},
]
},
{
text: 'Do you need an Asbestos Management plan?',
answers: [
{
text: "Yes",
value: '6'
},
{
text: "No",
value: '7'
},
]
}
]
};
var app = new Vue({
el: "#app",
data: {
quiz: quiz,
questionIndex: 0,
responses: [],
errors: [],
error: ''
},
methods: {
prev: function() {
this.questionIndex--;
},
next: function() {
if (this.responses[this.questionIndex] === undefined) {
this.errors[this.questionIndex] = 1;
this.error = 'Please select your answer';
}
else {
this.errors[this.questionIndex] = 0;
this.questionIndex++;
}
},
score: function() {
},
playAgain: function() {
this.questionIndex = 0;
}
}
});
HTML:
<html lang="en">
<head>
<title>Vue quiz/survey</title>
<meta name="viewport" content="width=device-width"/>
<script src="https://unpkg.com/vue/dist/vue.js"></script>
<!-- <link rel="stylesheet" href="index.css"> -->
</head>
<body>
<div id="app">
<div class="container">
<div class="jumbotron mt-3">
<h1 class="mb-5">{{ quiz.title }}</h1>
<hr>
<p v-if="errors[questionIndex]" class="alert alert-danger">
{{ error }}
</p>
<div v-for="(question, index) in quiz.questions">
<div v-show="index === questionIndex">
<h4 class="mt-5 mb-3">{{ question.text }}</h4>
<div v-for="answer in question.answers" class="form-check">
<label class="form-check-label">
<input class="form-check-input" type="radio"
:value="answer.value"
:name="index"
v-model="responses[index]">
{{answer.text}}
</label>
</div>
<div class="mt-5">
<button
class="btn btn-primary"
v-if="questionIndex > 0"
#click="prev">
prev
</button>
<button class="btn btn-secondary" #click="next">
next
</button>
</div>
</div>
</div>
<div v-show="questionIndex === quiz.questions.length">
<h3>Your Results</h3>
<p>
You are: {{ score() }}
</p>
<button class="btn btn-success" #click="playAgain">
Play Again!
</button>
</div>
</div>
</div>
</div>
<script type="text/javascript" src="index.js"></script>
</body>
</html>
I thought that this sounded like a potentially interesting exercise, so I spent some time creating an implementation in a Vue CLI sandbox app that I built and use for trying out various ideas.
I learned a few things, and hopefully you will get something out of it. I left the 'Previous' functionality as a TODO if you decide you like it and want implement that yourself.
QuizQuestions.vue
<template>
<div class="quiz-questions">
<div class="jumbotron mt-3">
<h1 class="mb-5">{{ quiz.title }}</h1>
<hr>
<question v-if="!showResults" :question="currentQuestion" #answer-selected="processAnswer" />
<div class="mt-5">
<button class="btn btn-primary" v-if="currentQuestionId > 1 && !showResults" #click="getPreviousQuestion">
prev
</button>
<button v-if="!showResults" class="btn btn-secondary" #click="getNextQuestion">
{{ nextButtonLabel }}
</button>
</div>
<div v-if="showResults">
<h3>Your Results</h3>
<table class="table table-bordered">
<thead>
<tr>
<th>QUESTION</th>
<th>ANSWER</th>
</tr>
</thead>
<tbody>
<tr v-for="(response, index) in responses" :key="index">
<td>{{ getQuestionText(response.questionId) }}</td>
<td>{{ getAnswerText(response.answerId) }}</td>
</tr>
</tbody>
</table>
<button class="btn btn-success" #click="playAgain">
Play Again!
</button>
</div>
</div>
</div>
</template>
<script>
import quiz from './quiz.js';
import Question from '#/components/stackoverflow/Question'
export default {
components: {
Question
},
data() {
return {
quiz: quiz,
currentQuestionId: 1,
currentAnswerId: 1,
previousQuestionId: 0,
responses: [],
showResults: false,
errors: [],
error: ''
}
},
computed: {
currentQuestion() {
return this.quiz.questions.find( question => {
return question.id === this.currentQuestionId;
})
},
nextQuestionId() {
let retVal = 0;
if (this.currentAnswerId > 0) {
let tempAnswer = this.currentQuestion.answers.find( answer => {
return answer.id === this.currentAnswerId;
});
retVal = tempAnswer.nextQuestionId;
}
return retVal;
},
lastQuestion() {
return this.currentQuestion.answers[0].nextQuestionId === 0;
},
nextButtonLabel() {
return this.lastQuestion ? 'Finish' : 'Next';
}
},
methods: {
getPreviousQuestion() {
this.currentQuestionId = this.previousQuestionId;
},
getNextQuestion() {
// TODO: Look for existing response for this question in case the 'Previous' button was pressed
// If found, update answer
// Store current question id and answer id in responses
let response = { questionId: this.currentQuestionId, answerId: this.currentAnswerId };
this.responses.push(response);
if (this.lastQuestion) {
this.showResults = true;
return;
}
this.previousQuestionId = this.currentQuestionId;
this.currentQuestionId = this.nextQuestionId;
//console.log(this.responses);
},
getQuestionText(id) {
let result = this.quiz.questions.find( question => {
return question.id === id;
});
return result.text;
},
getAnswerText(id) {
// NOTE: Since answers are currently limited to '1 = Yes' and '2 = No',
// this method does not need to involve any look up
return id === 1 ? 'Yes' : 'No';
},
processAnswer(selectedAnswerId) {
this.currentAnswerId = selectedAnswerId;
},
score() {
return 'TODO'
},
playAgain() {
this.currentQuestionId = 1;
this.showResults = false;
this.responses = [];
}
}
}
</script>
Question.vue
<template>
<div class="question">
<h4 class="mt-5 mb-3">{{ question.text }}</h4>
<div class="form-check" v-for="(answer, idx) in question.answers" :key="idx">
<input class="form-check-input" type="radio"
:value="answer.id" v-model="answerId" #change="answerSelected">
<label class="form-check-label">
{{answer.text}}
</label>
</div>
</div>
</template>
<script>
export default {
props: {
question: {
type: Object,
required: true
}
},
data() {
return {
answerId: 1
}
},
watch:{
question() {
// Reset on new question
this.answerId = 1;
}
},
methods: {
answerSelected() {
this.$emit('answer-selected', this.answerId);
}
}
}
</script>
I also modified your test data by adding various ID properties to help with tracking, as well as created a few more placeholder questions.
quiz.js
const quiz = {
title: "Asbestos Quiz",
questions: [
{
id: 1,
text: 'Do you need help with an Asbestos Survey?',
answers: [
{
id: 1,
text: "Yes",
nextQuestionId: 2
},
{
id: 2,
text: "No",
nextQuestionId: 3
},
]
},
{
id: 2,
text: 'Was your property constructed pre 2000',
answers: [
{
id: 1,
text: "Yes",
nextQuestionId: 4
},
{
id: 2,
text: "No",
nextQuestionId: 5
},
]
},
{
id: 3,
text: 'Do you need an Asbestos Management plan?',
answers: [
{
id: 1,
text: "Yes",
nextQuestionId: 6
},
{
id: 2,
text: "No",
nextQuestionId: 7
},
]
},
{
id: 4,
text: 'Question 4',
answers: [
{
id: 1,
text: "Yes",
nextQuestionId: 0
},
{
id: 2,
text: "No",
nextQuestionId: 0
},
]
},
{
id: 5,
text: 'Question 5',
answers: [
{
id: 1,
text: "Yes",
nextQuestionId: 0
},
{
id: 2,
text: "No",
nextQuestionId: 0
},
]
},
{
id: 6,
text: 'Question 6',
answers: [
{
id: 1,
text: "Yes",
nextQuestionId: 0
},
{
id: 2,
text: "No",
nextQuestionId: 0
},
]
},
{
id: 7,
text: 'Question 7',
answers: [
{
id: 1,
text: "Yes",
nextQuestionId: 0
},
{
id: 2,
text: "No",
nextQuestionId: 0
},
]
}
]
};
export default quiz;
Related
I'm trying to implement a load more button to my code. I would be able to this in javascript but I can't find a similar way in vue.
This is my vue code. I've tried asking the element with the company id but it's not reactive so I can't just change the style.
<main>
<ul>
<li v-for="company in companiesdb" :key="company.id" v-bind:id="company.id" ref="{{company.id}}" style="display: none">
{{company.name}}<br>
{{company.email}}
</li>
</ul>
</main>
this is my failed atempt of doing it in javascript but as I've mentioned before ref is not reactive so I can't do it this way
limitView: function (){
const step = 3;
do{
this.numberCompaniesVis ++;
let li = this.$refs[this.numberCompaniesVis];
li.style = "display: block";
}while (this.numberCompaniesVis % 3 != step)
}
I think the way you are approaching this problem is a little complex. Instead, you can create a computed variable that will change the number of lists shown.
Here's the code
<template>
<div id="app">
<ul>
<li v-for="(company, index) in companiesLoaded" :key="index">
{{ company }}
</li>
</ul>
<button #click="loadMore">Load</button>
</div>
</template>
<script>
export default {
name: "App",
data() {
return {
companiesdb: [3, 4, 1, 4, 1, 2, 4, 4, 1],
length: 5,
};
},
methods: {
loadMore() {
if (this.length > this.companiesdb.length) return;
this.length = this.length + 3;
},
},
computed: {
companiesLoaded() {
return this.companiesdb.slice(0, this.length);
},
},
};
</script>
So instead of loading the list from companiesdb, create a computed function which will return the new array based on companiesdb variable. Then there's the loadMore function which will be executed every time user clicks the button. This function will increase the initial length, so more lists will be shown.
Here's the live example
Just use computed property to create subset of main array...
const vm = new Vue({
el: '#app',
data() {
return {
companies: [
{ id: 1, name: "Company A" },
{ id: 2, name: "Company B" },
{ id: 3, name: "Company C" },
{ id: 4, name: "Company D" },
{ id: 5, name: "Company E" },
{ id: 6, name: "Company F" },
{ id: 7, name: "Company G" },
{ id: 8, name: "Company H" },
{ id: 9, name: "Company I" },
{ id: 10, name: "Company J" },
],
companiesVisible: 3,
step: 3,
}
},
computed: {
visibleCompanies() {
return this.companies.slice(0, this.companiesVisible)
}
}
})
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div id="app">
<ul>
<li v-for="company in visibleCompanies" :key="company.id" :id="company.id">
{{company.name}}
</li>
</ul>
<button #click="companiesVisible += step" v-if="companiesVisible < companies.length">Load more...</button>
</div>
I’m new to vue.js. I’m building a wizard, but one step I can’t figure out.
I’ve got a checkbox list that outputs the list a user has choosen. So far so good.
In the same array there is an urlAnchor that needs to be combined in the final url.
So for instance, if the user selects extra1 and extra2, the list will be:
List view
Product: Extra 1
Price: 129
URL Anchor: /iii
Product: Extra 2
Price: 49
URL Anchor: /jjj
URL
URL needs to be google.com/iii/jjj
But I don’t know how to combine the 2 url anchors in 1 url.
Can someone help me with this please?
My code:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Test</title>
</head>
<body>
<!-- wizard -->
<div id="app">
<div v-for="(extraItem, index) in extra" v-bind:id="'extraItem-'+extraItem.id" :class="'w-1/2 overflow-hidden my-1 px-1 item-'+index" >
<input type="checkbox" class="extraCheckboxes" :id="extraItem.name" :value="extraItem.name" v-model="checkedExtras" #click="saveExtra(index)">
<label class="form-check-label" :for="extraItem.id">{{extraItem.name}}</label>
</div>
<h1>Output:</h1>
<h2> List view </h2>
<div v-for="extra in extraOutput">
<strong>Product:</strong> {{extra.name}} <br />
<strong>Price:</strong> <span class="items" :data-value="extra.price">{{extra.price}}</span><br />
URL Anchor: {{extra.urlAnchor}}
<p> </p>
</div>
<h2> URL </h2>
<button><a v-for="extra in extraOutput" :href="'https://google.be'+extra.urlAnchor">Button text</a></button>
</div>
<!-- scripts -->
<script src='https://cdnjs.cloudflare.com/ajax/libs/vue/2.6.10/vue.min.js'></script>
<script type="text/javascript">
function extras() {
return [
{ id: 1, name: "Extra 1", price: 129, urlAnchor:"/iii" , selected: false },
{ id: 2, name: "Extra 2", price: 49, urlAnchor:"/jjj" , selected: false },
{ id: 3, name: "Extra 3", price: 59, urlAnchor:"/ggg" , selected: false },
{ id: 4, name: "Extra 4", price: 69, urlAnchor:"/hhh" , selected: false }];
}
new Vue({
el: "#app",
data() {
return {
extra: extras(),
checkedExtras: [],
data: [],
};
},
methods: {
saveExtra: function (index) {
this.extra[index].selected = !this.extra[index].selected;
}
},
computed: {
extraOutput: function () {
let extra = this.extra.filter(function (item) {
return item.selected === true;
});
return extra;
}
}
});
</script>
</body>
</html>
You've already done most of the work with by writing the extraOutput computed.
computed: {
extraOutput() {
const anchorsOfSelectedExtras = this.extra
.filter(extra => extra.selected) //get array of only selected
.map(extra => extra.urlAnchor); //turn array of objects into array of strings
return anchorsOfSelectedExtras.join(''); //turn array of strings into one joined string
}
}
You can also go even shorter:
computed: {
extraOutput() {
return this.extra.reduce((accumulator, extra) => extra.selected ? [...accumulator, extra.urlAnchor] : accumulator, []).join('');
}
}
I'm training in Vue.js by doing a quiz. I did a submit system and deleting a questions. But i want to add a Question adder. I tried this:
addQuestion()
{
if (this.question != "") {
this.questions.push(this.question);
this.question = "";
}
else
{
alert("You didnt write a question")
}
}
but that didnt works. Any help? Full code:
HTML:
<body>
<div id="app">
<div class="question" v-for="(question, index) in questions">
<h2>{{ question.question }}</h2><button #click="deleteQuestion(index)" class="doprava"><img src="criss.png"/></button>
<label v-for="answer in question.answers" class="answer" :class="{ 'answer-correct':answer.correct, 'answer-false':answer.false }">
<input type="checkbox" :value="answer.id" v-model="question.selected"> {{ answer.answer }}
</label>
</div>
<hr>
<button #click="onSubmit()">Submit</button>
<button #click="addQuestion()">Add Question</button><br><br>
<label >Question: </label>
<input v-model="question" type="text"><br><br>
<label v-model="answer-correct">Correct Answer: </label>
<input type="text"><br><br>
<label v-model="answer-false">Answer: </label>
<input type="text"><br><br>
<label v-model="answer-false">Answer: </label>
<input type="text">
</div>
<!-- development version, includes helpful console warnings -->
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<script src="questions.js"></script>
<script src="script.js"></script>
</body>
JS:
var vm = new Vue({
el: "#app",
data: {
questions: questions,
result: 0
},
methods: {
onSubmit() {
this.result = 0
this.questions.forEach(question => {
question.answers.forEach(answer => {
answer.correct = question.correct.includes(answer.id);
answer.false = question.false.includes(answer.id);
});
});
},
deleteQuestion(index)
{
this.questions.splice(index, 1);
},
addQuestion()
{
if (this.question != "") {
this.questions.push(this.question);
this.question = "";
}
else
{
alert("You didnt write a question")
}
}
}
});
Questions in JS:
var questions = [
{
question: "1+1 is",
answers: [
{ id: 0, answer: "1", correct: false },
{ id: 1, answer: "0", correct: false },
{ id: 2, answer: "2", correct: false }
],
correct: [2],
selected: [],
false: [0, 1]
},
{
question: "Is Donald Trump egoistic?",
answers: [
{ id: 0, answer: "Yes", correct: false },
{ id: 1, answer: "No", correct: false }
],
correct: [0],
selected: [],
false: [1]
}
];
Any properties which you use in a v-model attribute for an input field should first be declared in data to make them reactive.
Here you are using question, answer-correct and answer-false in v-model. These should all be declared in data. Also, you are using answer-false twice, meaning both of these inputs will resolve to the same value. If you want to have multiple values here, you may want to create answer-false-a and answer-false-b or something like that.
You can add these to data like this:
data: {
questions: questions,
result: 0,
question: '',
answer-correct: '',
answer-false-a: '',
answer-false-b: ''
},
Replace your js code with this
var vm = new Vue({
el: "#app",
data: {
questions: questions,
result: 0,
question: {
question: "",
answers: [],
correct: [],
selected: [],
false: []
}
},
methods: {
onSubmit() {
this.result = 0
this.questions.forEach(question => {
question.answers.forEach(answer => {
answer.correct = question.correct.includes(answer.id);
answer.false = question.false.includes(answer.id);
});
});
},
deleteQuestion(index)
{
this.questions.splice(index, 1);
},
addQuestion()
{
if (this.question != "") {
this.questions.push(Object.assign({},this.question)); // this is to avoid pushing an object with the same reference address. A better way is to use the cloneDeep option from lodash library which can clone an object with multiple nested elements.
this.question = "";
}
else
{
alert("You didnt write a question")
}
}
}
In my vue-app I have an array of job-postings, which have different states, such as "active", "rejected", "draft", "not_active" etc. Now I have a TabMenu: All Jobs, Drafts and To Be Approved. Each of those MenuTabs, have their own Dropdown menu, where you are supposed to filter the jobpostings. I've realized that this feature is more complex than expected, or maybe I have spend too much time with the issues, but for some reason, I cannot manage, to show "all" for the individual MenuTab. For example, when I click on the "To Be Approved" MenuTab, I want to see all the jobpostings, with the status "Not approved" and "Rejected" (See data below in the code).
So my question is, how to solve this properly? Does the job-posting data object need to have a category too?
Any help is most welcome!
So, here is my component:
<template>
<div>
<div class="tabs">
<ul>
<li v-for="(tab, index) in menuTabs” :key="tab.id" :class="{ 'active': activeTab === index }"
#click="toggleList(tab, index)” >
<span>{{tab.label}}</span>
</li>
</ul>
</div>
<div class="dropdown has-prepend col-8" :class="{ active: isOpen }">
<div :class="{ active: isOpen }" class="dropdown-select" #click="toggle">
{{ selectedOption }}
<i class="icon-chevron_down" />
</div>
<div class="dropdown-options" v-show="isOpen">
<div class="option" v-for="tab in dropDownTabs" #click="select(tab)" :key="tab.id">
<span>{{ tab.status }}</span>
</div>
</div>
</div>
<div class="block">
<DataTable :data="filteredData" :columns="tableColumns" :filter="search" />
</div>
</div>
</template>
import DataTable from '../../snippets/DataTable';
export default {
components: { DataTable },
data() {
return {
isOpen: false,
search: "",
tableData: [
{
id: 1,
title: "Salesperson",
publish_date: "2019-07-10",
status: "active",
applicants: 23,
expiration_date: "2020-02-21"
},
{
id: 2,
title: "Developer",
publish_date: "2019-11-12",
status: "not_active",
applicants: 111,
expiration_date: "2020-02-21"
},
{
id: 3,
title: "Freelanceer",
publish_date: "2019-06-10",
status: "need_approval",
applicants: 222,
expiration_date: "2020-01-10"
},
{
id: 4,
title: "Construction worker",
publish_date: "2019-12-06",
status: "active",
applicants: 76,
expiration_date: "2020-03-15"
},
{
id: 5,
title: "IT support”
publish_date: "2019-11-20",
status: "draft",
applicants: 103,
expiration_date: "2020-04-31"
},
],
menuTabs: [
{
label: "All jobs",
options: [
{
status: "all",
},
{
status: "active",
},
{
status: "not_active"
}
]
},
{
label: "Drafts",
options: [
{
status: "all"
},
{
status: "draft"
}
]
},
{
label: "To Be Approved",
options: [
{
status: "all",
},
{
status: "need_approval",
},
{
status: "rejected"
}
]
},
],
dropDownTabs: [],
selectedOption: "",
selectedTabCategory: "",
category: "",
activeTab: "",
tableColumns: [
"id",
"title",
"publish_date",
"status",
"applicants",
"expiration_date"
]
}
},
computed: {
filteredData() {
let status = this.selectedOption;
let category = this.category;
let filtered = this.tableData.filter(data => {
if (status == "all") {
return data;
}
return data.status === status;
});
return filtered;
}
},
methods: {
toggleList(tab, index) {
this.category = tab.options[0].category;
this.selectedTabCategory = tab;
let currentTabOptions = this.selectedTabCategory.options;
this.clearDropDown();
this.selectedOption = currentTabOptions[0].status;
currentTabOptions.forEach(option => {
this.dropDownTabs.push(option);
});
this.activeTab = index;
},
toggle() {
this.isOpen = !this.isOpen;
},
select(tab) {
this.selectedOption = tab.status;
let category = tab.category;
let filtered = this.tableData.filter(data => {
return data.status === this.selectedOption;
});
this.isOpen = false;
return filtered;
},
clearDropDown() {
this.dropDownTabs = [];
}
},
created() {},
mounted() {
this.selectedOption = this.menuTabs[0].options[0].status;
this.selectedTabCategory = this.menuTabs[0].label;
this.category = this.menuTabs[0].options[0].category;
let defaultOptions = this.menuTabs[0].options;
defaultOptions.forEach(option => {
this.dropDownTabs.push(option);
});
this.activeTab = 0;
}
};
I am not sure if it will help you at all. However I will try anyway.
You should store the selected tab when you click on it. Then filter the this.tableData based on the selected tab options. Also you will need map the tab option options to array of strings, so you can check if the posting status is in there.
methods: {
toggleList (tab, index) {
this.selectedTabObject = tab
// rest of your code...
}
},
computed: {
filteredData () {
return this.tableData.filter(data => {
const states = this.selectedTabObject.options.map(opt => opt.status)
return states.includes(data.status)
})
}
}
Also I have created simple fiddle to mimic your problem.
https://jsfiddle.net/3hqnp7u2/7/
I am trying to implement nested comments in vue.js and nuxt.js.
Each comment can have one or more children comments.
Each child comment, can again, have one or more children comments.
Unlimited levels of nested comments is possible.
As you can see in the diagram I have attached, I would like each comment to "know" (for the sake of simplicity, to display) the following information:
The depth of the comment (I have this working already). Example, all of the "top-level" comments are at depth=0, all their children are at depth=1, and so on.
The number of direct children
the number of children (including nested children, unlimited levels deep)
I came across this question on StackOverflow but it doesn't quite do the trick. Or maybe I am doing something wrong.
In case you want to take a look at my (very messy) code, here it is. However, I'm willing to start over, so appreciate any pointers on how to pass the data up / down the chain of nested comments (vue components). Some sample code would be great.
components/PostComment.vue:
<template>
<div>
<div class="tw-flex tw-flex-wrap tw-justify-end">
<div :class="indent" class="tw-w-full tw-flex">
<div class="tw-font-bold tw-p-4 tw-border-gray-400 tw-border tw-rounded tw-text-right">
<div class="kb-card-section">
<div class="kb-card-section-content tw-flex tw-flex-wrap tw-items-center tw-text-left">
<div class="tw-flex tw-w-full">
<div class="tw-hidden md:tw-block md:tw-w-2/12 tw-text-right tw-my-auto">
<div class="tw-flex">
<p class="tw-w-full tw-text-xs tw-text-gray-600 tw-text-right">children: {{ numNestedChildComments }}, depth: {{depth}}</p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<div class="tw-w-full" v-if="commentData.nested_comments" v-for="nestedComment in commentData.nested_comments">
<post-comment
:commentData="nestedComment"
:depth="depth + 1"
:numChildCommentsOfParent=numNestedChildComments
/>
</div>
</div>
</div>
</template>
<script>
export default {
name: 'post-comment', // necessary for recursive components / nested comments to work
props: {
depth: {
type: Number,
required: true
},
postAuthorData: {
type: Object,
required: true
},
commentAuthorData: {
type: Object,
required: true
},
commentData: {
type: Object,
required: true
},
numChildCommentsOfParent: {
type: Number,
required: true
},
},
data() {
return {
numNestedChildComments: this.numChildCommentsOfParent,
}
},
mounted() {
this.incrementNumParentComments();
},
methods: {
incrementNumParentComments() {
this.numNestedChildComments++;
this.$emit('incrementNumParentComments');
},
},
computed: {
indent() {
switch (this.depth) {
case 0:
return "tw-ml-0 tw-mt-1";
case 1:
return "tw-ml-4 tw-mt-1";
case 2:
return "tw-ml-8 tw-mt-1";
case 3:
default:
return "tw-ml-12 tw-mt-1";
}
},
},
}
</script>
Figured it out with some help from Rodrigo Pedra from the Laracasts community.
Here as a parent component calling the tree roots:
<template>
<div>
<MyTree v-for="item in records" :key="item.id" :item="item" />
</div>
</template>
<script>
import MyTree from './MyTree';
const FIXTURE = [
{
id: 1,
children: [
{
id: 2,
children: [{id: 3}, {id: 4}, {id: 5}],
},
{
id: 6,
children: [
{id: 7},
{id: 8, children: [{id: 9}, {id: 10}]},
],
},
],
},
{
id: 11,
children: [
{id: 12, children: [{id: 13}, {id: 14}, {id: 15}]},
{id: 16, children: [{id: 17}]},
{id: 18},
],
},
];
export default {
components: {MyTree},
data() {
return {
records: FIXTURE,
};
},
};
</script>
And here is the tree component:
<template>
<div>
<div style="border: 1px solid black; padding: 5px;" :style="offset">
id: {{ item.id }}
// depth: {{ depth }}
// direct: {{ direct }}
// children: {{ childrenCount }}
</div>
<template v-if="item.children">
<MyTree
v-for="record in item.children"
:key="record.id"
:item="record"
:depth="depth + 1"
#born="handleBorn()" />
</template>
</div>
</template>
<script>
const COLORS = [
'white',
'lightgray',
'lightblue',
'lightcyan',
'lightskyblue',
'lightpink',
];
export default {
// MUST give a name in recursive components
// https://vuejs.org/v2/guide/components-edge-cases.html#Recursive-Components
name: 'MyTree',
props: {
item: {type: Object, required: true},
depth: {type: Number, default: 0},
},
data() {
return {
childrenCount: 0,
};
},
computed: {
direct() {
if (Array.isArray(this.item.children)) {
return this.item.children.length;
}
return 0;
},
offset() {
return {
'margin-left': (this.depth * 20) + 'px',
'background-color': COLORS[this.depth % COLORS.length],
};
},
},
mounted() {
this.$emit('born');
},
methods: {
handleBorn() {
this.childrenCount++;
this.$emit('born');
},
},
};
</script>
Screenshot: