xml
Install
Note, if you're using @xml/client
or @xml/component
, you don't need to install @xmpp/xml
yourself.
npm install @xmpp/xml
or yarn add @xmpp/xml
const xml = require('@xmpp/xml')
const {xml} = require('@xmpp/client')
const {xml} = require('@xmpp/component')
Writing
There's 2 methods for writing XML with xmpp.js
factory
const xml = require('@xmpp/xml')
const recipient = 'user@example.com'
const days = ['Monday', 'Tuesday']
const message = xml(
'message',
{to: recipient},
xml('body', {}, 1 + 2),
xml('days', days.map(day => xml('day', {}, day)))
)
Used in xmpp.js source code.
JSX
const xml = require('@xmpp/xml')
const recipient = 'user@example.com'
const days = ['Monday', 'Tuesday']
const message = (
<message to={recipient}>
<body>{1 + 2}</body>
<days>
{days.map(day => (
<day>${day}</day>
))}
</days>
</message>
)
Used in xmpp.js tests.
Requires a preprocessor but if you're already using Babel and/or need to write big chunks of XML it's a good choice. See our .babelrc for a configuration example.
Reading
attributes
The attrs
properties holds xml attributes for an element.
message.attrs.to
text
Returns the text value of an element
message.getChild('body').text()
getChild
Get child element by name.
message.getChild('body').toString()
getChildren
Get children elements by name.
message.getChild('days').getChildren('day')
getChildText
Get child element text value.
message.getChildText('body')
Editing
attributes
The attrs
properties holds xml attributes for an element.
message.attrs.type = 'chat'
Object.assign(message.attrs, {type: 'chat'})
text
Set the text value of an element
message.getChild('body').text('Hello world')
append
Adds text or element nodes to the last position.
Returns the parent.
message.append(xml('foo'))
message.append('bar')
message.append(days.map(day => xml('day', {}, day)))
prepend
Adds text or element nodes to the first position.
Returns the parent.
message.append(xml('foo'))
message.append('bar')
message.append(days.map(day => xml('day', {}, day)))
remove
Removes a child element.
const body = message.getChild('body')
message.remove(body)
JSON
You can embed JSON anywhere but it is recommended to use an appropriate semantic.
message.append(
<myevent xmlns="xmpp:example.org">
<json xmlns="urn:xmpp:json:0">{JSON.stringify(days)}</json>
</myevent>
)
JSON.parse(
message
.getChild('myevent', 'xmpp:example.org')
.getChildText('json', 'urn:xmpp:json:0')
)
See JSON Containers