在下面的Mozilla函数中,JS用于向文档中添加标签。当onload事件触发时,我感到困惑。onload会在脚本开始下载或已经下载时触发吗?
function prefixScript(url, onloadFunction) {
var newScript = document.createElement("script");
newScript.onerror = loadError;
if (onloadFunction) { newScript.onload = onloadFunction; }
document.currentScript.parentNode.insertBefore(newScript, document.currentScript);
newScript.src = url;
}
https://developer.mozilla.org/en-US/docs/Web/API/HTMLScriptElement
谢谢
https://stackoverflow.com/questions/56449922
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