How to display alt text for an image in chrome

The image with invalid source displays an alternate text in Firefox but not in chrome unless the width of an image is adjusted.

  <img height="90" width="90"
    src="http://www.google.com/intl/en_ALL/images/logos/images_logo_lg.gif"开发者_开发技巧
    alt="Image Not Found"/>

How to display the alt text for an image?

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If I'm correct, this is a bug in webkit (according to this). I'm not sure if there is much you can do, sorry for the weak answer.

There is, however, a work around which you can use. If you add the title attribute to your image (e.g. title="Image Not Found") it'll work.

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You can use the title attribute.

<img height="90" width="90"
src="http://www.google.com/intl/en_ALL/images/logos/images_logo_lg.gif"
alt="Google Images" title="Google Images" />

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Yes it's an issue in webkit and also reported in chromium: http://code.google.com/p/chromium/issues/detail?id=773 It's there since 2008... and still not fixed!!

I'm using a piece of javacsript and jQuery to make my way around this.

function showAlt(){$(this).replaceWith(this.alt)};
function addShowAlt(selector){$(selector).error(showAlt).attr("src", $(selector).src)};
addShowAlt("img");

If you only want one some images:

addShowAlt("#myImgID");

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Use title attribute instead of alt

<img
  height="90"
  width="90"
  src="http://www.google.com/intl/en_ALL/images/logos/images_logo_lg12.gif"
  title="Image Not Found"
/>

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Here is a simple workaround in jQuery. You can implement it as a user script to apply it to every page you view.

$(function () {
  $('img').live('mouseover', function () {
    var img = $(this); // cache query
    if (img.title) {
      return;
    }
    img.attr('title', img.attr('alt'));
  });
});

I have also implemented this as a Chrome extension called alt. Because it uses jQuery.live, it works with dynamically loaded content, too. I have retired this extension and removed it from the Chrome store.

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Various browsers (mis)handle this in various ways. Using title (an old IE 'standard') isn't particularly appropriate, since the title attribute is a mouseover effect. The jQuery solution above (Alexis) seems on the right track, but I don't think the 'error' occurs at a point where it could be caught. I've had success by replacing at the src with itself, and then catching the error:

$('img').each(function()
{
    $(this).error(function()
    {
        $(this).replaceWith(this.alt);
    }).attr('src',$(this).prop('src'));
});

This, as in the Alexis contribution, has the benefit of removing the missing img image.

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Internet Explorer 7 (and earlier) displays the value of the alt attribute as a tooltip, when mousing over the image. This is NOT the correct behavior, according to the HTML specification. The title attribute should be used instead. Source: http://www.w3schools.com/tags/att_img_alt.asp

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To display the Alt text of missing images, we have to add a style like this. I think, there is no need to add extra javascript for this.

.Your_Image_Class_Name {
  font-size: 14px;
}

It's work for me. Enjoy!!!!

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You can put title attribute to tag.I hope it will work.

<img src="smiley.gif" title="Smiley face" width="42" height="42">

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This can be entered in the javascript console to replace empty titles with alt text (if available) for images on a single page:

[...document.getElementsByTagName('img')].forEach((x) => {
  if(x.getAttribute('alt') && !x.getAttribute('title')){
    x.setAttribute('title',x.getAttribute('alt'));}})

It doesn't require JQuery.

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I use this, it works with php...

<span><?php
if (file_exists("image/".$data['img_name'])) {
  ?>
  <img src="image/<?php echo $data['img_name']; ?>" width="100" height="100">
  <?php
}else{
  echo "Image Not Found";
}>?
</span>

Essentially what the code is doing, is checking for the File. The $data variable will be used with our array then actually make the desired change. If it isn't found, it will throw an Exception.