HTML5 中 cross-origin 属性的用法是什么?
官方规范将 cross-origin 属性定义为 −
The crossorigin attribute is a CORS settings attribute. Its purpose is to allow images from third-party sites that allow cross-origin access to be used with canvas.
当它与 CORS header 结合时,它允许使用加载来自外域的元素定义的图像,用于画布中。过程就像从当前域加载一样。
可以使用它来解决 JavaScript 错误,例如记录 js 错误 −
if (securityOrigin()->canRequest(targetUrl)) {
msg = myError;
line = myLineNumber;
source = sourceURL;
} else {
msg = "Error!";
source = String();
line = 0;
}
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