Lewisham Council - Lewisham Heritage

Lewisham Council - Library charges and fines

Lewisham Council - Join the library

Lewisham Council - Renewing library items

Lewisham Council - The Household Support Fund

Lewisham Council - Single Support Grant

Lewisham Council - Cost of living crisis

Lewisham Council - Party Wall etc. Act 1996

Lewisham Council - Motorcycle parking

Lewisham Council - Early years education

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

September 2025

August 2025

London Borough of Lewisham Council

	Title / URL	Issues
	Lewisham Council - Lewisham Heritagelewisham.gov.uk/myservices/libraries/heritage	16
	Lewisham Council - Library charges and fineslewisham.gov.uk/myservices/libraries/library-charges-and-fines	13
	Lewisham Council - Join the librarylewisham.gov.uk/myservices/libraries/join-the-library	11
	Lewisham Council - Renewing library itemslewisham.gov.uk/myservices/libraries/renewing-library-items	10
	Lewisham Council - The Household Support Fundlewisham.gov.uk/myservices/benefits/the-household-fund	8
	Lewisham Council - Single Support Grantlewisham.gov.uk/myservices/benefits/single-support-grant	8
	Lewisham Council - Cost of living crisislewisham.gov.uk/myservices/cost-of-living	8
	Lewisham Council - Party Wall etc. Act 1996lewisham.gov.uk/myservices/planning/party-wall-act	8
	Lewisham Council - Motorcycle parkinglewisham.gov.uk/myservices/parking/motorcycle-parking	8
	Lewisham Council - Early years educationlewisham.gov.uk/myservices/education/earlyyears	7

Ensure links explain they open in a new tab

London Borough of Lewisham Council

Where this issue has occurred