[英]Displaying json data from server in basic html table using for loop, javascript only, problem with for loop?
我有以下 Javascript 代碼:
var request = new XMLHttpRequest();
request.open("GET", "http://localhost:8080/CarSales/rest/cars", true);
request.onreadystatechange = function(){
if(request.readyState === XMLHttpRequest.DONE){
var status = request.status;
if (status === 0 || (status >= 200 && status < 400)){
var cars = JSON.parse(request.responseText);
var output = "";
for(var i in cars){
output ='<tr><td>'+cars[i].make+'</td><td>'+cars[i].model+'</td><td>'+cars[i].year+'</td> <td>'+cars[i].engine+'</td></tr>';
}
document.getElementById('table-body').innerHTML = output;
}else{
console.log("error");
}
}
};
request.send();
以及以下 HTML:
<!DOCTYPE html>
<html>
<head>
<script src="js/Q4.js"></script>
<meta charset="ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<table id="table">
<tr>
<th>Make</th>
<th>Model</th>
<th>Year</th>
<th>Engine</th>
</tr>
<tbody id="table-body"></tbody>
</table>
</body>
</html>
目前它正確輸出表中json數據的最后一個object: https://i.stack.imgur.com/V73pC.png
如何將 output 所有 json 對象的 JS 代碼放入表中? 也許通過更改 for 循環來遍歷 json 數據?
您在每個循環中都錯過了 append。 只需在 output + = "" 之后添加它沒有附加這就是只顯示最后一個循環值的原因。
for(var i in cars){
output +='<tr><td>'+cars[i].make+'</td><td>'+cars[i].model+'</td><td>'+cars[i].year+'</td> <td>'+cars[i].engine+'</td></tr>';
}
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