node-red/nodes/core/core/80-function.html

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Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<script type="text/x-red" data-template-name="function">
<div class="form-row">
<label for="node-input-name"><i class="icon-tag"></i> Name</label>
<input type="text" id="node-input-name" placeholder="Name">
</div>
<div class="form-row">
<label for="node-input-func"><i class="icon-wrench"></i> Function</label>
<input type="hidden" id="node-input-func" autofocus="autofocus">
<div style="height: 250px;" class="node-text-editor" id="node-input-func-editor" ></div>
</div>
<div class="form-row">
<label for="node-input-outputs"><i class="icon-random"></i> Outputs</label>
<input id="node-input-outputs" style="width: 60px; height: 1.7em;" value="1">
</div>
<div class="form-tips">See the Info tab for help writing functions.</div>
</script>
<script type="text/x-red" data-help-name="function">
<p>A function block where you can write code to do more interesting things.</p>
<p>The message is passed in as a JavaScript object called <code>msg</code>.</p>
<p>By convention it will have a <code>msg.payload</code> property containing
the body of the message.</p>
<p>The function should return the messages it wants to pass on to the next nodes
in the flow. It can return:</p>
<ul>
<li>a single message object - passed to nodes connected to the first output</li>
<li>an array of message objects - passed to nodes connected to the corresponding outputs</li>
</ul>
<p>If any element of the array is itself an array of messages, multiple
messages are sent to the corresponding output.</p>
<p>If null is returned, either by itself or as an element of the array, no
message is passed on.</p>
<p>See the <a target="_new" href="http://nodered.org/docs/writing-functions.html">online documentation</a> for more help.</p>
</script>
<script type="text/javascript">
RED.nodes.registerType('function',{
color:"#fdd0a2",
category: 'function',
defaults: {
name: {value:""},
func: {value:"\nreturn msg;"},
outputs: {value:1}
},
inputs:1,
outputs:1,
icon: "function.png",
label: function() {
return this.name;
},
oneditprepare: function() {
$( "#node-input-outputs" ).spinner({
min:1
});
function functionDialogResize(ev,ui) {
$("#node-input-func-editor").css("height",(ui.size.height-275)+"px");
};
$( "#dialog" ).on("dialogresize", functionDialogResize);
$( "#dialog" ).one("dialogopen", function(ev) {
var size = $( "#dialog" ).dialog('option','sizeCache-function');
if (size) {
functionDialogResize(null,{size:size});
}
});
$( "#dialog" ).one("dialogclose", function(ev,ui) {
var height = $( "#dialog" ).dialog('option','height');
$( "#dialog" ).off("dialogresize",functionDialogResize);
});
var that = this;
require(["orion/editor/edit"], function(edit) {
that.editor = edit({
parent:document.getElementById('node-input-func-editor'),
lang:"js",
contents: $("#node-input-func").val()
});
RED.library.create({
url:"functions", // where to get the data from
type:"function", // the type of object the library is for
editor:that.editor, // the field name the main text body goes to
fields:['name','outputs']
});
$("#node-input-name").focus();
});
},
oneditsave: function() {
$("#node-input-func").val(this.editor.getText())
delete this.editor;
}
});
</script>