我打算从中打印ETH的美元价值
“ https://api.coinmarketcap.com/v1/ticker/ethereum/”
使用JavaScript。但是,当我包含脚本
时<script type="text/javascript">
var xmlhttp = new XMLHttpRequest();
var url = "";
xmlhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
var json = JSON.parse(this.responseText);
parseJson(json);
}
};
xmlhttp.open("GET", url, true);
xmlhttp.send();
function parseJson(json) {
var time = "<b>Last Updated : " + json["time"]["updated"] + "</b>";
var usdValue = "$" + json["eth"]["price.usd"]["rate"];
document.getElementById("data").innerHTML =
usdValue
}
</script>
在我的HTML文件中,以及其他Price API的其他脚本中,以上代码未返回任何内容。我究竟做错了什么?我需要帮助。
答案 0 :(得分:0)
尝试类似的方法
<body>
<div id="data" />
<script type="text/javascript">
var json = new XMLHttpRequest(); // start a new variable to store the JSON in
json.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) { // if HTTP header 200 - ok
var object = JSON.parse(this.responseText); // set the variable 'object' to whatever we get back, in our case it is an array of 10 different arrays
for(var i=0;i<object.length;i++){ // looping through json
var item = object[i];
if(item["symbol"] === "ETH"){ // finding when symbol is ETH
var usdValue = "$" + item["price_usd"]; // Fetching price_usd value
document.getElementById("data").innerHTML = usdValue;
}
}
}
};
json.open(
"GET", // method
"https://api.coinmarketcap.com/v1/ticker/ethereum/", // url
true // async
); // initialise the request
json.send(); //send request
</script>
</body>
答案 1 :(得分:0)
let time = `<b>Last Updated : ${new Date(parseInt(json['last_updated'])).toDateString()}</b>`;
let usdValue = `\$${json['price_usd']}`;