以编程方式停止 GIF 动画

问题描述：

我正在开发一个 Twitter 应用程序，它直接从 Twitter 引用图像.如何防止播放 gif 动画?

I am developing a Twitter application which references to the images directly from Twitter. How can I prevent animated gifs from being played?

在页面末尾使用 window.stop() 在 Firefox 中对我不起作用.

Using window.stop() at the end of the page does not work for me in Firefox.

有更好的 JavaScript hack 吗?最好这应该适用于所有浏览器

Is there a better JavaScript hack? Preferable this should work for all browsers

答

这不是跨浏览器的解决方案，但它适用于 firefox 和opera(不适用于 ie8 :-/).取自此处

This is not a cross browser solution but this worked in firefox and opera (not in ie8 :-/). Taken from here

[].slice.apply(document.images).filter(is_gif_image).map(freeze_gif);

function is_gif_image(i) {
    return /^(?!data:).*\.gif/i.test(i.src);
}

function freeze_gif(i) {
    var c = document.createElement('canvas');
    var w = c.width = i.width;
    var h = c.height = i.height;
    c.getContext('2d').drawImage(i, 0, 0, w, h);
    try {
        i.src = c.toDataURL("image/gif"); // if possible, retain all css aspects
    } catch(e) { // cross-domain -- mimic original with all its tag attributes
        for (var j = 0, a; a = i.attributes[j]; j++)
            c.setAttribute(a.name, a.value);
        i.parentNode.replaceChild(c, i);
    }
}

以编程方式停止 GIF 动画

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