How to Bind to CSS Classes in UI5 XML Views Using the \'class\' Attribute?

Mary-Kate Olsen
Release: 2024-10-29 23:32:29
Original
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How to Bind to CSS Classes in UI5 XML Views Using the

Binding in Control with "class" Attribute

Binding to CSS classes in XML views through the "class" attribute is not directly supported by UI5. However, a workaround using custom data can be implemented:

Using Custom Data for Binding

  1. Add custom data to your control, setting the writeToDom property and binding it to the desired expression:

    <code class="xml"><Text class="myControl">
      <customData>
        <core:CustomData writeToDom="{= myExpression }" key="green" value="" />
      </customData>
    </Text></code>
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  2. Define a CSS selector that targets the control based on the custom data value. For example:

    <code class="css">.myApp .sapText.myControl[data-green] { /* ... */ }</code>
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Example

In the following example, the "green" class is added to the control when its "enabled" property is true:

<code class="xml"><Text class="myControl">
  <customData>
    <core:CustomData writeToDom="{= ${myTable>enabled} ? 'green' : 'red' }" key="green" value="" />
  </customData>
</Text></code>
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<code class="css">.myApp .sapText.myControl[data-green] { color: green; }
.myApp .sapText.myControl[data-red] { color: red; }</code>
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Considerations

  • While binding to custom data allows for manipulating CSS styles, it is important to consider the following:
  • Custom CSS styles should be used cautiously, as they can impact UI consistency and maintenance.
  • Explore alternative solutions, such as using semantic classes or custom formatters, before resorting to custom CSS.

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