# Reverse Condition Value

### How Does It Work?

In JavaScript, the exclamation mark is frequently used to negate a boolean expression.

When appended to a value, Geoflow will reverse the outcome of the evaluated condition. This means that if the original result is true, it will be negated to return false, and vice versa.

### How To Implement

<table><thead><tr><th>Attribute Name</th><th width="268.3333333333333">Attribute Value</th><th>Which Page Element?</th></tr></thead><tbody><tr><td>data-geo-visibility</td><td>conditionName:!conditionValue</td><td>Any Element</td></tr></tbody></table>

The exclamation mark (!) must be placed after the semicolon and before the condition value.

### Examples

<table data-card-size="large" data-view="cards"><thead><tr><th>Attribute Value</th><th>Description</th><th data-hidden>Attribute Name</th></tr></thead><tbody><tr><td><mark style="color:yellow;"><code>countryCode:!AU</code></mark></td><td>The element is visibile to everyone around the globe, except for those in Australia.</td><td>data-geo-visibility</td></tr><tr><td><mark style="color:yellow;"><code>isMobile:true;countryCode:!CA</code></mark></td><td>The element is only visible to mobile visitors or anyone not in Canada.</td><td>data-geo-visibility</td></tr><tr><td><mark style="color:yellow;"><code>language:!fr</code></mark></td><td>The element is visibile to anyone whose primary browser language is not currently set as French.</td><td>data-geo-visibility</td></tr><tr><td><mark style="color:yellow;"><code>deviceType:!Desktop;isEU:true</code></mark></td><td>The element is only visible to visitors in the European Union or anyone not on a desktop computer (e.g. Tablet and Mobile visitors).</td><td></td></tr></tbody></table>