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typeof() : Get Type Name

Get the type name of a value. Useful for debugging and conditional logic.

On this page

Signature

typeof(value)

Parameters

Parameter Type Required Description
value Any Yes The value to get the type of

Returns

Type: String

The .NET type name of the value.

Common Type Names

Type Result
String "System.String"
Int32 "System.Int32"
Int64 "System.Int64"
Double "System.Double"
Decimal "System.Decimal"
Boolean "System.Boolean"
DateTime "System.DateTime"
Array "System.Object[]" or specific array type
Null "System.Object" or null

Examples

Debug Output

{{log "Value type: " typeof(model.value) level="debug"}}
<p>Value: {{model.value}}</p>

Data:

doc.Params["model"] = new {
    value = 42
};

Log Output:

Value type: System.Int32

Type-Based Conditional

{{#if typeof(model.data) == 'System.String'}}
  <p>String value: {{model.data}}</p>
{{else if typeof(model.data) == 'System.Int32'}}
  <p>Integer value: {{model.data}}</p>
{{else}}
  <p>Type: {{typeof(model.data)}}, Value: {{model.data}}</p>
{{/if}}

Debugging Collection Types

{{#each model.items}}
  {{log "Item type: " typeof(this) " Value: " this level="debug"}}
  <p>{{this}}</p>
{{/each}}

Type Inspection for Troubleshooting

<div class="debug-info">
  <h3>Type Information</h3>
  <ul>
    <li>model: {{typeof(model)}}</li>
    <li>model.user: {{typeof(model.user)}}</li>
    <li>model.count: {{typeof(model.count)}}</li>
    <li>model.price: {{typeof(model.price)}}</li>
    <li>model.isActive: {{typeof(model.isActive)}}</li>
  </ul>
</div>

Data:

doc.Params["model"] = new {
    user = "John Doe",
    count = 42,
    price = 19.99m,
    isActive = true
};

Output:

<div class="debug-info">
  <h3>Type Information</h3>
  <ul>
    <li>model: <>f__AnonymousType0</li>
    <li>model.user: System.String</li>
    <li>model.count: System.Int32</li>
    <li>model.price: System.Decimal</li>
    <li>model.isActive: System.Boolean</li>
  </ul>
</div>

Notes

  • Returns full .NET type name
  • Useful for debugging data binding issues
  • Can be used in conditional logic
  • Anonymous types show generated names
  • For null values, behavior may vary
  • Primarily a debugging tool
  • Use with {{log}} helper for tracing

See Also