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Put the image and text in the same wrapper, set that wrapper to position: relative, then position the text with position: absolute. React renders the image and live text; ordinary CSS controls where the text appears.
Add live text over an image with JSX and CSS
This React DOM example places a caption at the lower edge of a responsive image. Replace the sample source and caption with your content.
function ImageWithText({ src, alt, children }) {
return (
<div className="image-overlay">
<img className="image-overlay__image" src={src} alt={alt} />
<div className="image-overlay__text">{children}</div>
</div>
);
}
.image-overlay {
position: relative;
width: 100%;
aspect-ratio: 16 / 9;
overflow: hidden;
}
.image-overlay__image {
display: block;
width: 100%;
height: 100%;
object-fit: cover;
}
.image-overlay__text {
position: absolute;
inset: auto 1rem 1rem;
color: white;
background: rgb(0 0 0 / 65%);
padding: 0.75rem 1rem;
}
The wrapper’s position: relative establishes the containing reference for the absolutely positioned text while keeping the wrapper in normal page flow. An absolutely positioned element is removed from normal flow and placed relative to its nearest positioned ancestor. If the intended wrapper is not positioned, the text may instead be placed relative to another ancestor.
Use React content, not text baked into pixels
Pass text as children, for example <ImageWithText src="/photo.jpg" alt="A hiker beside a lake">Trail conditions</ImageWithText>. This keeps the words as ordinary document text: they can be selected, styled, and resized independently of the image. React uses className for CSS classes. If a style depends on a JavaScript value, React also supports inline style objects.
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- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
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- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
Choose how the image fits its box
The example’s aspect-ratio: 16 / 9 is a design choice, not a React requirement. Pick a ratio that suits the content. Because the image is sized to the wrapper, object-fit determines how its intrinsic shape fills that box.
| Value | Result | Use when |
|---|---|---|
cover |
Fills the box without distorting the image; some edges may be cropped. | Filling the whole area matters more than showing every edge. |
contain |
Shows the full image without distortion, but may leave unfilled space. | The entire image must remain visible. |
fill (default) |
Can distort an image when the box and image have different aspect ratios. | Avoid for mismatched dimensions unless distortion is intended. |
object-fit affects an image after it has been resized. Keep the image and text in the same wrapper so they remain aligned as the wrapper changes size.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
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- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
Make the overlay accessible and readable
Choose meaningful alternative text
Set alt to a concise description of meaningful image content; do not use “image” as the description or simply repeat the overlay caption. If the image is purely decorative and the overlay already provides the relevant information, use alt="" so assistive technology can skip it.
Keep the overlay as text and check contrast
Use an HTML text node for words that should remain readable and adaptable, rather than drawing them into an image or canvas. W3C guidance recommends using text wherever possible because image text scales less well and makes foreground and background changes harder. Check contrast where the text actually sits on the photo: WCAG 2.2 guidance sets a minimum contrast ratio of 4.5:1 for normal text and 3:1 for large text, subject to the criterion’s exceptions. A translucent panel or gradient can improve legibility, but verify the result against the image behind it.
Rank #3
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- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
If the final result must be a single image or canvas with the words permanently embedded, it is no longer ordinary HTML text. Canvas has no alt attribute; for image-like canvas content that needs a description, MDN recommends role="img" with an aria-label.
Troubleshoot common overlay problems
- Text appears in the wrong place: Set
position: relativeon the wrapper that directly contains both the image and overlay. Check whether a different positioned ancestor is being used. - Text drifts when the image resizes: Keep both elements in the same wrapper and size the image to that wrapper. Apply
object-fitto the resized image. - The photo looks stretched: Avoid forcing unequal rendered width and height with the default
fill. Choosecoverto fill with cropping orcontainto preserve the full image. - Text is hard to read over part of the photo: Check contrast at the text’s actual location and add a backing panel or gradient if necessary.
- Screen readers announce the image awkwardly: Decide whether the image conveys information or is decorative; provide a useful
altdescription for the former and an emptyaltfor the latter.
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Rank #4
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- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
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Quick Recap
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
Sources
- React: Adding styles
- React: Common components
- MDN: position
- MDN: object-fit
- React: img
- MDN: img accessibility
- W3C WAI: Understanding WCAG 2.2 contrast minimum
- MDN: Canvas accessibility
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