Question

I noticed that when I do something like this (with jQuery, but I don’t think it matters):

$("#myDiv").html("<img src='/image.png'/> this is my image.");

The browser displays the text first, and then the image is loaded, and shifts the text to the right which creates a horrible flickering effect.

The image doesn’t appear to be cached by the browser. Any idea why ? How can I avoid this phenomena when loading images into the DOM ?

Answer 1

How can I avoid this phenomena when loading images into the DOM ? there are two major methods (may be more :))

1) Set the actual size of the img <img with='20' height='20' src='...' /> or via CSS style.

2) Use image preload and insert your code only when image is loaded

var img = new Image(); 
$(img).load(function(){  
    $("#myDiv").append($(this))
               .append(document.createTextNode("this is my image.");
    // or your way, browser should take image from cache
    $("#myDiv").append("<img src='/image.png'/> this is my image.");     
 }).attr('src', '/image.png');

ps: there is a serious bag in SO engine – code formatting does not want to combine with numbered listing. So I removed the list.