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<!doctype html>
<html>
<head>
<title>axios - post example</title>
<link rel="stylesheet" type="text/css" href="/javascript/bootstrap/css/bootstrap.min.css"/>
<style>
.postSubmission {
margin-top: 40px;
/* white-space: pre-line; */
}
.checkNetwork {
margin-bottom: 10px;
}
.text-strong {
font-weight: 700;
}
.hidden {
display: none;
}
</style>
</head>
<body class="container">
<h1>Post multipart/form-data</h1>
<form role="form" class="form" onsubmit="return false;">
<div class="form-group">
<label for="data">someString</label>
<input id="someString" type="text"></input>
</div>
<div class="form-group">
<label for="data">someNumber</label>
<input id="someNumber" type="number"></input>
</div>
<div class="form-group">
<label for="data">someSmallFile</label>
<input id="someSmallFile" type="file"></input>
</div>
<div class="form-group">
<label for="data">nested.someString</label>
<input id="nested.someString" type="text"></input>
</div>
<div>
<input type="radio" name="format" value="formData"
checked>
<label for="huey">Pass to Axios as FormData</label>
</div>
<div>
<input type="radio" name="format" value="json"
checked>
<label for="huey">Pass to Axios as json. Let Axios convert to form data</label>
</div>
<button id="post" type="button" class="btn btn-primary">POST</button>
</form>
<div class="postSubmission">
<div id="checkNetwork" class="checkNetwork hidden">
<span class="text-strong">Check devtools to see details of request sent, and content of FormData. </span><br/>
In Chromium check: devtools -> network tab -> request to "server" -> payload tab
</div>
<div id="errorOutput" class="text-danger">
</div>
</div>
<script src="/axios.min.js"></script>
<script>
(function () {
document.getElementById('post').onclick = function () {
// Show network/loading indicator
document.getElementById("checkNetwork").classList.remove("hidden");
// Grab values from inputs
const someString = document.getElementById('someString').value;
const someNumber = document.getElementById('someNumber').valueAsNumber;
const files = Array.from(document.getElementById('someSmallFile').files);
const nestedString = document.getElementById('nested.someString').value;
const passAsFormData = document.querySelector('input[name="format"]:checked').value === "formData";
const data = passAsFormData ? new FormData() : {};
// Helper to add value to FormData or plain object
function addValueToData(key, val, isValDefined) {
if (!isValDefined) return;
if (passAsFormData) {
data.append(key, val);
} else {
const keys = key.split(".");
if (keys.length === 1) {
data[key] = val;
} else {
// Preserve existing nested objects if any
data[keys[0]] = data[keys[0]] || {};
data[keys[0]][keys[1]] = val;
}
}
}
addValueToData("someString", someString, someString.length > 0);
addValueToData("someNumber", someNumber, !isNaN(someNumber));
if (files.length) addValueToData("someSmallFile", files[0], true);
addValueToData("nested.someString", nestedString, nestedString !== undefined && nestedString !== null);
const errorOutput = document.getElementById("errorOutput");
axios({
url: '/postMultipartFormData/server',
data: data,
method: "post",
headers: passAsFormData ? { "Content-Type": "multipart/form-data" } : {},
})
.then(res => {
errorOutput.innerHTML = "Successfully posted!";
})
.catch(err => {
console.error("Error posting data:", err);
errorOutput.innerHTML = `${err.message}`;
});
};
})();
</script>
</body>
</html>
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