Question:
I'm in the last few days looking at Google for something that serves to read a simple XML file and display it in an HTML page using pure javascript, I don't want to use Jquery, just javascript.
I would like the XML data to be displayed in a common HTML table with TR and TD.
Is there any simple way to do this? Or some online example to test? Because I didn't find it.
Thanks
Answer:
you can make an AJAX request to read the XML , once it's loaded, you can browse it similarly to browsing your page's DOM elements, using getElementById , getElementsByTagName , etc.
below is an example of how to read an XML with some books, since
// copiando os dados da tag `book` para o objeto `Book`
var Book = function (node) {
var that = this;
this.id = node.id;
[].forEach.call(node.childNodes, function (child, indice) {
if (child.nodeType == 1) {
that[child.nodeName] = child.textContent;
}
});
}
// criando um link para um XML.
var xml = document.getElementById("xml").innerHTML;
var url = URL.createObjectURL(new Blob([xml], { type: "application/xml" }));
var tbody = document.querySelector("tbody");
// lendo um XML por AJAX.
var httpRequest = new XMLHttpRequest();
httpRequest.open("GET", url, true)
httpRequest.addEventListener("readystatechange", function () {
if (httpRequest.readyState == 4) {
var catalog = httpRequest.responseXML.getElementsByTagName("catalog")[0];
var books = catalog.getElementsByTagName("book");
[].forEach.call(books, function (node, indice) {
var book = new Book(node);
var linha = document.createElement("tr");
for (var indice = 0; indice < 6; indice++) {
var celula = document.createElement("td");
linha.appendChild(celula);
}
linha.dataset.id = book.id;
linha.children[0].textContent = book.author;
linha.children[1].textContent = book.title;
linha.children[2].textContent = book.genre;
linha.children[3].textContent = book.price;
linha.children[4].textContent = book.publish_date;
linha.children[5].textContent = book.description;
tbody.appendChild(linha);
});
}
});
httpRequest.send();tr td {
white-space: nowrap;
}
tr td:nthchild(5) {
text-overflow: ellipsis;
}<table>
<thead>
<tr>
<th>Author</th>
<th>Title</th>
<th>Genre</th>
<th>Prince</th>
<th>Publish Date</th>
<th>Description</th>
</tr>
</thead>
<tbody>
</tbody>
</table>
<template id="xml">
<?xml version="1.0"?>
<catalog>
<book id="bk101">
<author>Gambardella, Matthew</author>
<title>XML Developer's Guide</title>
<genre>Computer</genre>
<price>44.95</price>
<publish_date>2000-10-01</publish_date>
<description>An in-depth look at creating applications
with XML.</description>
</book>
<book id="bk102">
<author>Ralls, Kim</author>
<title>Midnight Rain</title>
<genre>Fantasy</genre>
<price>5.95</price>
<publish_date>2000-12-16</publish_date>
<description>A former architect battles corporate zombies,
an evil sorceress, and her own childhood to become queen
of the world.</description>
</book>
<book id="bk103">
<author>Corets, Eva</author>
<title>Maeve Ascendant</title>
<genre>Fantasy</genre>
<price>5.95</price>
<publish_date>2000-11-17</publish_date>
<description>After the collapse of a nanotechnology
society in England, the young survivors lay the
foundation for a new society.</description>
</book>
<book id="bk104">
<author>Corets, Eva</author>
<title>Oberon's Legacy</title>
<genre>Fantasy</genre>
<price>5.95</price>
<publish_date>2001-03-10</publish_date>
<description>In post-apocalypse England, the mysterious
agent known only as Oberon helps to create a new life
for the inhabitants of London. Sequel to Maeve
Ascendant.</description>
</book>
<book id="bk105">
<author>Corets, Eva</author>
<title>The Sundered Grail</title>
<genre>Fantasy</genre>
<price>5.95</price>
<publish_date>2001-09-10</publish_date>
<description>The two daughters of Maeve, half-sisters,
battle one another for control of England. Sequel to
Oberon's Legacy.</description>
</book>
<book id="bk106">
<author>Randall, Cynthia</author>
<title>Lover Birds</title>
<genre>Romance</genre>
<price>4.95</price>
<publish_date>2000-09-02</publish_date>
<description>When Carla meets Paul at an ornithology
conference, tempers fly as feathers get ruffled.</description>
</book>
<book id="bk107">
<author>Thurman, Paula</author>
<title>Splish Splash</title>
<genre>Romance</genre>
<price>4.95</price>
<publish_date>2000-11-02</publish_date>
<description>A deep sea diver finds true love twenty
thousand leagues beneath the sea.</description>
</book>
<book id="bk108">
<author>Knorr, Stefan</author>
<title>Creepy Crawlies</title>
<genre>Horror</genre>
<price>4.95</price>
<publish_date>2000-12-06</publish_date>
<description>An anthology of horror stories about roaches,
centipedes, scorpions and other insects.</description>
</book>
<book id="bk109">
<author>Kress, Peter</author>
<title>Paradox Lost</title>
<genre>Science Fiction</genre>
<price>6.95</price>
<publish_date>2000-11-02</publish_date>
<description>After an inadvertant trip through a Heisenberg
Uncertainty Device, James Salway discovers the problems
of being quantum.</description>
</book>
<book id="bk110">
<author>O'Brien, Tim</author>
<title>Microsoft .NET: The Programming Bible</title>
<genre>Computer</genre>
<price>36.95</price>
<publish_date>2000-12-09</publish_date>
<description>Microsoft's .NET initiative is explored in
detail in this deep programmer's reference.</description>
</book>
<book id="bk111">
<author>O'Brien, Tim</author>
<title>MSXML3: A Comprehensive Guide</title>
<genre>Computer</genre>
<price>36.95</price>
<publish_date>2000-12-01</publish_date>
<description>The Microsoft MSXML3 parser is covered in
detail, with attention to XML DOM interfaces, XSLT processing,
SAX and more.</description>
</book>
<book id="bk112">
<author>Galos, Mike</author>
<title>Visual Studio 7: A Comprehensive Guide</title>
<genre>Computer</genre>
<price>49.95</price>
<publish_date>2001-04-16</publish_date>
<description>Microsoft Visual Studio 7 is explored in depth,
looking at how Visual Basic, Visual C++, C#, and ASP+ are
integrated into a comprehensive development
environment.</description>
</book>
</catalog>
</template>In the example above I used a blob to create a link to an XML in memory, in a final system, this is not necessary, after all you must already have the XML hosted on your machine.
In any case, this approach can be useful, if you need to read an XML hosted on the User's machine, for that the user will need to upload the file, so you can read it.
// copiando os dados da tag `book` para o objeto `Book`
var Book = function (node) {
var that = this;
this.id = node.id;
[].forEach.call(node.childNodes, function (child, indice) {
if (child.nodeType == 1) {
that[child.nodeName] = child.textContent;
}
});
}
// criando um link para um XML.
var tbody = document.querySelector("tbody");
var fileUpload = document.getElementById("fileUpload");
fileUpload.addEventListener("change", function (event) {
var file = fileUpload.files[0];
if (file.type.indexOf("xml") == -1)
return;
var url = URL.createObjectURL(file);
var httpRequest = new XMLHttpRequest();
httpRequest.open("GET", url, true)
httpRequest.addEventListener("readystatechange", function () {
if (httpRequest.readyState == 4) {
var catalog = httpRequest.responseXML.getElementsByTagName("catalog")[0];
var books = catalog.getElementsByTagName("book");
[].forEach.call(books, function (node, indice) {
var book = new Book(node);
var linha = document.createElement("tr");
for (var indice = 0; indice < 6; indice++) {
var celula = document.createElement("td");
linha.appendChild(celula);
}
linha.dataset.id = book.id;
linha.children[0].textContent = book.author;
linha.children[1].textContent = book.title;
linha.children[2].textContent = book.genre;
linha.children[3].textContent = book.price;
linha.children[4].textContent = book.publish_date;
linha.children[5].textContent = book.description;
tbody.appendChild(linha);
});
}
});
httpRequest.send();
});tr td {
white-space: nowrap;
}
tr td:nthchild(5) {
text-overflow: ellipsis;
}<input id="fileUpload" type="file" />
<table>
<thead>
<tr>
<th>Author</th>
<th>Title</th>
<th>Genre</th>
<th>Prince</th>
<th>Publish Date</th>
<th>Description</th>
</tr>
</thead>
<tbody>
</tbody>
</table> A simpler way to get the same result is to use a FileReader instead of combining the URL.createObjectURL(file) with XMLHttpRequest , but when using XMLHttpRequest , you can use the same codebase, to read local *.xml files and remote. In any case, an example using FileReader .
var file = fileUpload.files[0];
var leitor = new FileReader();
leitor.addEventListener("load", function() {
var xmlDocument = new DOMParser().parseFromString(this.result, "text/xml");
var catalog = xmlDocument.getElementsByTagName("catalog")[0];
//restante do codigo aqui.
});
reader.readAsText(file );