JS function execution order
I have two pages namely Parent.xhtml(controls the layout) and Child.xhtml(displays the content). Child page is included in the Parent page by using <iframe> tag.
I need to implement an onload functionality by using javascript. Before that, I want to know in which order the javascript f开发者_如何转开发unctions will execute?
Will the Parent page js function execute first? or Child page js function will execute first?
Awaiting your answers.! Thanks in advance
According to a previous answer, browsers might not wait for iframes to load before firing the onload event on the parent window. You can't make assumptions on which one will complete first - there's the possibility of a race condition going on there, so either one could finish first.
One solution might be to write a function that waits until it's been called a certain number of times before executing:
var runs = 0;
function onLoad() {
if (++runs < 2) return;
// put code to execute once both have loaded
}
Then in HTML:
<body onload="onLoad();">
.....
<iframe onload="onLoad();">
Alternatively, set the URL of the iframe in the onload handler of the parent window.
加载中,请稍侯......
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