标签存档： javascript

Apr 20 2016

gyp http 404 error while updating package in Atom

Description

While updating plugins on Atom, it often fails. If you try using apm to update manually, the gyp reports a 404 error.

E:\Atom\resources\app\apm\bin>apm install --check
Checking for native build tools failed
 
gyp info it worked if it ends with ok
gyp info using node-gyp@2.0.2
gyp info using node@0.10.40 | win32 | ia32
gyp http GET https://atom.io/download/atom-shell/v0.36.8/node-v0.36.8.tar.gz
gyp http 404 https://atom.io/download/atom-shell/v0.36.8/node-v0.36.8.tar.gz

E:\Atom\resources\app\apm\bin>apm install --check

Checking for native build tools failed

gyp info it worked if it ends with ok

gyp info using [email protected]

gyp info using [email protected] | win32 | ia32

gyp http GET https://atom.io/download/atom-shell/v0.36.8/node-v0.36.8.tar.gz

gyp http 404 https://atom.io/download/atom-shell/v0.36.8/node-v0.36.8.tar.gz

继续阅读 »

Oct 22 2015

javascript使用image.height和image.width获取图片宽高值为0，获取失败

当我使用javascript创建一个图片对象：

var image = new Image();
image.src = "apple.jpg";

var image = new Image();

image.src = "apple.jpg";

我以为可以这样获取图片的宽高值：

console.log("image", image);
console.log("image.src", image.src);
var height = image.height;
console.log("image.height", height);
console.log("image.naturalHeight", image.naturalHeight);
var width = image.width;
console.log("image.width", width);
console.log("image.naturalWidth", image.naturalWidth);

console.log("image", image);

console.log("image.src", image.src);

var height = image.height;

console.log("image.height", height);

console.log("image.naturalHeight", image.naturalHeight);

var width = image.width;

console.log("image.width", width);

console.log("image.naturalWidth", image.naturalWidth);

在某些电脑上的谷歌浏览器和IE11浏览器上，以上代码工作正常。但是火狐在第一次打开时却报出宽高值均为0。如果按F5刷新页面，火狐又能正确获取宽高值了。按Ctrl+F5忽略缓存的话，仍能复现这个问题。继续阅读 »

Oct 19 2015

JS get width() and height() of image 0 unexpectedly by using image.height and image.width

While creating a image object:

var image = new Image();
image.src = "apple.jpg";

var image = new Image();

image.src = "apple.jpg";

I thought I can get the height and width of the image like this:

console.log("image", image);
console.log("image.src", image.src);
var height = image.height;
console.log("image.height", height);
console.log("image.naturalHeight", image.naturalHeight);
var width = image.width;
console.log("image.width", width);
console.log("image.naturalWidth", image.naturalWidth);

console.log("image", image);

console.log("image.src", image.src);

var height = image.height;

console.log("image.height", height);

console.log("image.naturalHeight", image.naturalHeight);

var width = image.width;

console.log("image.width", width);

console.log("image.naturalWidth", image.naturalWidth);

In Chrome and IE11 on some computers, the code works as expected. But in Firefox, the height and width get 0 at the first time.If you refresh the page by pressing F5, It turns to be get the right value. Try testing it by pressing Ctrl+F5. 继续阅读 »

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标签存档： javascript

gyp http 404 error while updating package in Atom

Description

javascript使用image.height和image.width获取图片宽高值为0，获取失败

JS get width() and height() of image 0 unexpectedly by using image.height and image.width

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