我试图将数据从JSON文件中提取出来放在我的网站上,我遵循了该指南:https://developer.mozilla.org/en-US/docs/Learn/JavaScript/Objects/JSON,但是页面上没有任何显示。
我将代码放在这里:https://codepen.io/anon/pen/mMGjxK
我的HTML:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Sandbox</title>
</head>
<body>
This is a test.
<section>
</section>
<script src="script.js"></script>
</body>
</html>
我的JS:
var section = document.querySelector('section');
var retrieveData = 'https://raw.githubusercontent.com/okayauco/flashcards/master/sandbox/vocab-sandbox.json';
var request = new XMLHttpRequest();
request.open('GET', retrieveData);
request.responseType = 'JSON';
request.send();
request.onload = function() {
var vocabWords = request.response;
showWords(vocabWords);
}
function showWords(jsonObj) {
var words = jsonObj['vocabulary'];
for (var i = 0; i < words.length; i++) {
var theArticle = document.createElement('article');
var inEnglish = document.createElement('p');
var inRomaji = document.createElement('p');
var inHiragana = document.createElement('p');
var inKanji = document.createElement('p');
inEnglish.textContent = words[i].English;
inRomaji.textContent = words[i].Romaji;
inHiragana.textContent = words[i].Hiragana;
inKanji.textContent = words[i].Kanji;
}
theArticle.appendChild(inEnglish);
theArticle.appendChild(inRomaji);
theArticle.appendChild(inHiragana);
theArticle.appendChild(inKanji);
section.appendChild(theArticle);
}
我的JSON:
{"vocabulary":[
{"English":"one", "Romaji":"ichi", "Hiragana":"ぃち", "Kanji":"⼀" },
{"English":"two", "Romaji":"ni", "Hiragana":"に", "Kanji":"ニ" },
{"English":"three", "Romaji":"san", "Hiragana":"さん", "Kanji":"三" },
{"English":"four", "Romaji":"yon", "Hiragana":"よん", "Kanji":"四" }
]}
最佳答案
首先,您的json无效(最后一个逗号),但是下面的代码用于使用XMLHttpRequest获取内容。您应该使用有效的json源,然后重试。您可以通过https://jsonlint.com/验证json
其次,将appendChild移出for循环。那么它是不可附加的。检查我的固定代码。
var section = document.querySelector('section');
var xhttp = new XMLHttpRequest();
xhttp.responseType = 'JSON';
xhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
var vocabWords = this.response;
document.getElementById("demo").innerHTML = vocabWords;
showWords(JSON.parse(vocabWords.replace('"四" },', '"四" }'))); // <= This should work with a valid json format.
}
};
xhttp.open("GET", "https://raw.githubusercontent.com/okayauco/flashcards/master/sandbox/vocab-sandbox.json", true);
xhttp.send();
function showWords(jsonObj) {
var words = jsonObj['vocabulary'];
for (var i = 0; i < words.length; i++) {
var theArticle = document.createElement('article');
var inEnglish = document.createElement('p');
var inRomaji = document.createElement('p');
var inHiragana = document.createElement('p');
var inKanji = document.createElement('p');
inEnglish.textContent = words[i].English;
inRomaji.textContent = words[i].Romaji;
inHiragana.textContent = words[i].Hiragana;
inKanji.textContent = words[i].Kanji;
theArticle.appendChild(inEnglish);
theArticle.appendChild(inRomaji);
theArticle.appendChild(inHiragana);
theArticle.appendChild(inKanji);
section.appendChild(theArticle);
};
};
This is a test.
<section>
</section>
<div id="demo"></div>