JavaScriptの練習：JSON
JSONは、JavaScript Object Notationの略なんですね。。まさに、JavaScriptのための構造化表現ということです。その割には、手順が多いなぁ・・
糸を引くようなフォントに興味が湧き、再現してみました。こちらです。
JavaScriptはこんな感じです。
var header = document.querySelector('header');
var section = document.querySelector('section');
var requestURL = 'https://mdn.github.io/learning-area/javascript/oojs/json/superheroes.json';
var request = new XMLHttpRequest();
request.open('GET', requestURL);
request.responseType = 'json';
request.send();
request.onload = function() {
var superHeroes = request.response;
populateHeader(superHeroes);
showHeroes(superHeroes);
}
function populateHeader(jsonObj) {
var myH1 = document.createElement('h1');
myH1.textContent = jsonObj['squadName'];
header.appendChild(myH1);
var myPara = document.createElement('p');
myPara.textContent = 'Hometown: ' + jsonObj['homeTown'] + ' // Formed: ' + jsonObj['formed'];
header.appendChild(myPara);
}
function showHeroes(jsonObj) {
var heroes = jsonObj['members'];
for(var i = 0; i < heroes.length; i++) {
var myArticle = document.createElement('article');
var myH2 = document.createElement('h2');
var myPara1 = document.createElement('p');
var myPara2 = document.createElement('p');
var myPara3 = document.createElement('p');
var myList = document.createElement('ul');
myH2.textContent = heroes[i].name;
myPara1.textContent = 'Secret identity: ' + heroes[i].secretIdentity;
myPara2.textContent = 'Age: ' + heroes[i].age;
myPara3.textContent = 'Superpowers:';
var superPowers = heroes[i].powers;
for(var j = 0; j < superPowers.length; j++) {
var listItem = document.createElement('li');
listItem.textContent = superPowers[j];
myList.appendChild(listItem);
}
myArticle.appendChild(myH2);
myArticle.appendChild(myPara1);
myArticle.appendChild(myPara2);
myArticle.appendChild(myPara3);
myArticle.appendChild(myList);
section.appendChild(myArticle);
}
}
HTMLはこんな感じ。
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Our superheroes</title>
<link href="https://fonts.googleapis.com/css?family=Faster+One" rel="stylesheet">
<link rel="stylesheet" href="style.css">
</head>
<body>
<header></header>
<section></section>
<script src="script.js"></script>
</body>
</html>
CSSはこんな感じ
/* || general styles */
html {
font-family: 'helvetica neue', helvetica, arial, sans-serif;
}
body {
width: 800px;
margin: 0 auto;
}
h1, h2 {
font-family: 'Faster One', cursive;
}
/* header styles */
h1 {
font-size: 4rem;
text-align: center;
}
header p {
font-size: 1.3rem;
font-weight: bold;
text-align: center;
}
/* section styles */
section article {
width: 33%;
float: left;
}
section p {
margin: 5px 0;
}
section ul {
margin-top: 0;
}
h2 {
font-size: 2.5rem;
letter-spacing: -5px;
margin-bottom: 10px;
}