node-red/nodes/core/logic/16-range.html

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<script type="text/x-red" data-template-name="range">
    <div class="form-row">
        <label for="node-input-action"><i class="fa fa-dot-circle-o"></i> <span data-i18n="range.label.action"></span></label>
        <select id="node-input-action" style="width:70%; margin-right:5px;">
            <option value="scale" data-i18n="range.scale-payload"></option>
            <option value="clamp" data-i18n="range.scale-limit"></option>
            <option value="roll" data-i18n="range.scale-wrap"></option>
        </select>
    </div>
    <br/>
    <div class="form-row"><i class="fa fa-sign-in"></i> <span data-i18n="range.label.inputrange"></span>:</div>
    <div class="form-row"><label></label>
        <span data-i18n="range.label.from"></span>: <input type="text" id="node-input-minin" data-i18n="[placeholder]range.label.eg0ph" style="width:100px;"/>
        &nbsp;&nbsp;<span data-i18n="range.label.to"></span>: <input type="text" id="node-input-maxin" data-i18n="[placeholder]range.label.eg99ph" style="width:100px;"/>
    </div>
    <div class="form-row"><i class="fa fa-sign-out"></i> <span data-i18n="range.label.resultrange"></span>:</div>
    <div class="form-row"><label></label>
        <span data-i18n="range.label.from"></span>: <input type="text" id="node-input-minout" data-i18n="[placeholder]range.label.eg0ph" style="width:100px;"/>
        &nbsp;&nbsp;<span data-i18n="range.label.to"></span>: <input type="text" id="node-input-maxout" data-i18n="[placeholder]range.label.eg255ph" style="width:100px;"/>
    </div>
    <br/>
    <div class="form-row"><label></label>
        <input type="checkbox" id="node-input-round" style="display: inline-block; width: auto; vertical-align: top;">
        <label style="width: auto;" for="node-input-round"><span data-i18n="range.label.roundresult"></span></label></input>
    </div>
    <br/>
    <div class="form-row">
        <label for="node-input-name"><i class="fa fa-tag"></i> <span data-i18n="common.label.name"></span></label>
        <input type="text" id="node-input-name" data-i18n="[placeholder]common.label.nameph">
    </div>
    <div class="form-tips" id="node-tip"><span data-i18n="range.tip"></span></div>
</script>

<script type="text/x-red" data-help-name="range">
    <p>A simple function node to remap numeric input values to another scale.</p>
    <p>Currently only does a linear scaling.</p>
    <p><b>Note:</b> This only operates on <b>numbers</b>. Anything else will try to be made into a number and rejected if that fails.</p>
    <p><i>Scale and limit to target range</i> means that the result will never be outside the range specified within the result range.</p>
    <p><i>Scale and wrap within the target range</i> means that the result will essentially be a "modulo-style" wrap-around within the result range.</p>
</script>

<script type="text/javascript">
    RED.nodes.registerType('range', {
        color: "#E2D96E",
        category: 'function',
        defaults: {
            minin: {value:"",required:true,validate:RED.validators.number()},
            maxin: {value:"",required:true,validate:RED.validators.number()},
            minout: {value:"",required:true,validate:RED.validators.number()},
            maxout: {value:"",required:true,validate:RED.validators.number()},
            action: {value:"scale"},
            round: {value:false},
            name: {value:""}
        },
        inputs: 1,
        outputs: 1,
        icon: "range.png",
        label: function() {
            return this.name || this._("range.label.rangelabel");
        },
        labelStyle: function() {
            return this.name ? "node_label_italic" : "";
        }
    });
</script>