javascript - JQuery - Check to see if an IMG src is valid - Stack Overflow

admin管理员组

文章数量:1332649

Is it possible to check to see if an img src is valid using jquery?

We have a dynamic site with hundreds of news articles - the majority of which contain images - basically theres a back-end bug and even if there isn't an image currently the image div is displayed - which is causing us a few issues.

  <div class="imgBlock">
      <img class="newsImg" src="db/imgart/10234.jpg" />
  </div>

Is it possible to detect whether the img src is delivering an image via JQuery script?

Is it possible to check to see if an img src is valid using jquery?

We have a dynamic site with hundreds of news articles - the majority of which contain images - basically theres a back-end bug and even if there isn't an image currently the image div is displayed - which is causing us a few issues.

  <div class="imgBlock">
      <img class="newsImg" src="db/imgart/10234.jpg" />
  </div>

Is it possible to detect whether the img src is delivering an image via JQuery script?

• javascript
• jquery

Share Improve this question Follow asked Feb 26, 2015 at 10:53 DancerDancer 17.7k4040 gold badges131131 silver badges213213 bronze badges 2

• You should probably perform this check at the end of the document after the whole page is loaded. – Karan Commented Feb 26, 2015 at 11:05
• Take a look at this link : stackoverflow./questions/3381663/… – ggg Commented Feb 26, 2015 at 11:05

Add a ment  | 

3 Answers 3

Sorted by: Reset to default 4

function IsValidImageUrl(url) {
$("<img>", {
    src: url,
    error: function() { alert(url + ': ' + false); },
    load: function() { alert(url + ': ' + true); }
});
}

Use the error handler like this:

$(".newsImg").error(function() {
  alert("No image");
});

Or

var image = new Image(); 
image.src = "db/imgart/10234.jpg";
if (image.width == 0) {
  alert("No image");
}

Use simple css:

    <style type="text/css">
    .hidden {
    display: none;
    {
     .visible {
            display: block;
     }
    </style>

then script

var imgDiv = document.getElementById('img1'); //your div id
    var imgsrc = "db/imgart/10234.jpg"; //or document.getElementById(img1).getElementsByTagName('img');

    var img = new Image();

    img.onerror = function (evt){
    alert(this.src + " can't be loaded.");
    //hide <div>
    imgDiv.setAttribute('class', 'hidden');

    }
    img.onload = function (evt){
    alert(this.src + " is loaded.");
    //show div
    imgDiv.setAttribute('class', 'visible');
    }

    img.src = imgsrc;

本文标签： javascriptJQueryCheck to see if an IMG src is validStack Overflow