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Capture HTML Canvas as gif/jpg/png/pdf?
... has been revised:
var canvas = document.getElementById("mycanvas");
var img = canvas.toDataURL("image/png");
with the value in IMG you can write it out as a new Image like so:
document.write('<img src="'+img+'"/>');
...
C++静态和多态，亦敌亦友 - C/C++ - 清泛网 - 专注C/C++及内核技术
...函数，是类级共享的，不属于任何对象，也不会传入this指针，不能访问非静态成员；然而，虚函数的要求与此正相反，需要绑定对象（this指针），进而获得虚表，然后进行调用。如此矛盾的行为，编译器情何以堪，因为选择报...
How do I combine a background-image and CSS3 gradient on the same element?
...an use this:
background-color: #444; // fallback
background: url('PATH-TO-IMG') center center no-repeat; // fallback
background: url('PATH-TO-IMG') center center no-repeat, -moz-linear-gradient(top, @startColor, @endColor); // FF 3.6+
background: url('PATH-TO-IMG') center center no-repeat, -webkit...
CSS image resize percentage of itself?
I am trying to resize an img with a percentage of itself. For example, I just want to shrink the image by half by resizing it to 50%. But applying width: 50%; will resize the image to be 50% of the container element (the parent element which maybe the <body> for example).
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HTML if image is not found
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The best way to solve your problem:
<img id="currentPhoto" src="SomeImage.jpg" onerror="this.onerror=null; this.src='Default.jpg'" alt="" width="100" height="120">
onerror is a good thing for you :)
Just change the image file name and try yourself.
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Programmatically change the src of an img tag
How can I change the src attribute of an img tag using javascript?
9 Answers
9
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Detect when an image fails to load in Javascript
...ending on the server you are getting an image from. For example, sometimes imgur don't send an image that exists nor an 404 status and the error event is not triggered in this case.
– user3233318
Jun 4 '15 at 13:02
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C++虚析构函数解析 - C/C++ - 清泛网 - 专注C/C++及内核技术
...码中基类的析构函数不是虚函数,在main函数中用继承类的指针去操作继承类的成员,释放指针P的过程是：先释放继承类的资源，再释放基类资源。
b.第二段代码
#include<iostream>
using namespace std;
class ClxBase{
public:
ClxBase() {};...
Get image data url in JavaScript?
I have a regular HTML page with some images (just regular <img /> HTML tags). I'd like to get their content, base64 encoded preferably, without the need to redownload the image (ie. it's already loaded by the browser, so now I want the content).
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How to write a caption under an image?
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Figure and Figcaption tags:
<figure>
<img src='image.jpg' alt='missing' />
<figcaption>Caption goes here</figcaption>
</figure>
Gotta love HTML5.
See sample
#container {
text-align: center;
}
a, figure {
display: inl...