TMBC cookie policy – Tonbridge and Malling Borough Council

Apply for a dropped kerb – Tonbridge and Malling Borough Council

Taddington Valley – Tonbridge and Malling Borough Council

Platt Woods – Tonbridge and Malling Borough Council

Wrotham Hill viewing point – Tonbridge and Malling Borough Council

Priory Wood public open space – Tonbridge and Malling Borough Council

Woodland Walk – Tonbridge and Malling Borough Council

Woods Meadow – Tonbridge and Malling Borough Council

Holly Hill public open space – Tonbridge and Malling Borough Council

Basted Mill – Tonbridge and Malling Borough Council

Avoid opening links in a new tab or window. Where you must do this, include an explanation
in the text of the link.

## Why this matters

Opening links in a new tab or window breaks the back button and can be disorientating for 
novice web users, and the visually impaired. Generally you should avoid opening links in a
new tab or window, but if you have to, you should include text explaining that this will happen.

## How to fix

An explanation must be clear in the accessible text for the link. For example:

```html
<a href="products.html" target="_blank">
    Products (opens in new window)
</a>
```

Or, for an image inside a link:

```html
<a href="products.html" target="_blank">
    <img src="products.jpg" alt="Products (opens in new window)">
</a>
```

Rather than updating all of your links manually to do this, you can add a simple CSS
selector, such as:

```css
a[target="_blank"]:after {
    content: " (opens in new window)";
}
```

Note that doing this with an icon, is not sufficient to pass this check. The text must be
readable by screen readers.

Alternatively you can override the link text for accessible technologies (like screenreaders),
so that the appearance of the link does not change. For example:

```html
<a href="products.html" target="_blank" aria-label="Products (opens in new window)">
    Products
</a>
```

Note that if you do this, the `aria-label` will replace the text content of the link completely,
so it must still make sense in isolation.

## Terminology

Although it is common to say "opens in new window", almost all browsers now use tabs, and
so this terminology is potentially confusing. You may prefer: "opens in new tab".

## Methodology

1. Silktide considers all links on a page with a `target` attribute of `_blank`.
2. For each link, Silktide considers the screen-readable text of the link, which includes:
   * The text content of the link
   * Any `alt` text inside any images inside the link
   * Any `aria-label` or `aria-labelled-by` text
   * The `content` of the pseudo-elements `:before` and `:after`
3. This text is analysed for the presence of common text, including "opens new tab"
    and "opens new window". If the text is not found, the link fails the test.

## Further reading

Generally best practice is to avoid opening links in a new tab or window.  

The W3C provides detailed guidance on 
[when opening a link in a new window may be appropriate](https://www.w3.org/TR/WCAG20-TECHS/G200.html).

link-text-explains-open-in-new-window

January 2025

December 2024

Tonbridge and Malling Borough Council

Title / URL	Issues
TMBC cookie policy – Tonbridge and Malling Borough Councilwww.tmbc.gov.uk/website/tmbc-cookie-policy	17
Apply for a dropped kerb – Tonbridge and Malling Borough Councilwww.tmbc.gov.uk/planning/apply-dropped-kerb	13
Taddington Valley – Tonbridge and Malling Borough Councilwww.tmbc.gov.uk/taddington-valley	12
Platt Woods – Tonbridge and Malling Borough Councilwww.tmbc.gov.uk/platt-woods	12
Wrotham Hill viewing point – Tonbridge and Malling Borough Councilwww.tmbc.gov.uk/wrotham-hill	12
Priory Wood public open space – Tonbridge and Malling Borough Councilwww.tmbc.gov.uk/priory-wood	12
Woodland Walk – Tonbridge and Malling Borough Councilwww.tmbc.gov.uk/woodland-walk	12
Woods Meadow – Tonbridge and Malling Borough Councilwww.tmbc.gov.uk/woods-meadow	12
Holly Hill public open space – Tonbridge and Malling Borough Councilwww.tmbc.gov.uk/holly-hill	12
Basted Mill – Tonbridge and Malling Borough Councilwww.tmbc.gov.uk/basted-mill	12

Ensure links explain they open in a new tab

Tonbridge and Malling Borough Council

Where this issue has occurred