How to Disable Tooltip in Angular Based on Condition

Learn how to effectively `implement conditional tooltips` in Angular, allowing tooltips to show based on specific criteria like string length.
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How to Disable Tooltip in Angular Based on Condition

When developing applications with Angular, tooltips can enhance user experience by providing additional context or information. However, there may be scenarios when you want to conditionally display these tooltips based on specific data criteria. For instance, you may want to show a tooltip only if the length of a string exceeds a certain threshold. In this guide, we'll walk through how to achieve this functionality in Angular.

Understanding the Problem

You may have a situation where you want to display a tooltip only when certain conditions are met. For example, consider a case where you have a div element that shows some data, and you want to show a tooltip only if the length of that data exceeds 120 characters.

Example Scenario

Here's a brief overview of what we want to implement:

Conditional Tooltip Display: The tooltip should only appear if the length of the data (cellData[id]) is greater than 120 characters.

User-friendly Display: If the string length is less than or equal to 120, the tooltip will be disabled.

Let’s dive into how to implement this feature in Angular.

The Solution

To control the visibility of the tooltip based on a condition, Angular provides a directive called matTooltipDisabled. This directive allows us to dynamically disable the tooltip.

Implementation Steps

Basic Tooltip Setup: Start with a basic setup for your tooltip using matTooltip.

Condition to Disable Tooltip: Use the [matTooltipDisabled] directive and set its value based on a condition.

Example Code

Here’s how your div element would look:

[[See Video to Reveal this Text or Code Snippet]]

Explanation of the Code:

matTooltip: This attribute displays the tooltip with the text "Info about the action".

[matTooltipDisabled]: This directive dynamically enables or disables the tooltip based on the condition (cellData[id].length <= 120).

If the length of the data is less than or equal to 120, the tooltip is disabled.

If the length is greater than 120, the tooltip remains active.

Conditional Text: The content of the div uses a ternary operator to check the string length and appropriately slice the text to keep the UI tidy.

Conclusion

By using matTooltipDisabled in Angular, you can effectively manage when tooltips should display, enhancing the usability of your application. This not only helps to keep your interface clean but also ensures that users receive important information only when necessary.

Now you can implement conditional tooltips in your Angular applications with ease! Happy coding!