Problem Statement

In SAPUI5, developers often use the HTML control to embed dynamic or external HTML content within their apps. A common challenge arises when you need to update this content dynamically (e.g., loading new HTML from an API or changing a map view).

Many try rerender() on the HTML control, but:

• rerender() is deprecated.
• Using setContent() alone may not trigger a full DOM refresh in some browsers.
• Event handlers or scripts inside the new HTML may not execute as expected.

The result: the new content either does not render, or old scripts remain bound, leading to broken UI interactions.

Solution

1. Get your HTML control reference

var oHtml = this.byId("searchHTML");

2. Hide the control before updating content

oHtml.setVisible(false);

3. Set the new HTML content

oHtml.setContent('<iframe src="newContent.html" width="100%" height="600"></iframe>');

4. Make the control visible again

oHtml.setVisible(true);

Why it works:

• Hiding the control forces UI5 to completely redraw the control when it becomes visible again.
• The new HTML is fully injected into the DOM.
• Event handlers and scripts inside the new HTML now execute as expected.

Key Takeaways

• Deprecated methods like rerender() should be avoided in modern SAPUI5.
• Visibility toggling around setContent() is a safe and effective alternative.
• This approach ensures that dynamic HTML content updates reliably, including scripts, iframes, and event listeners.