我试图在用户单击按钮后检查 iframe 是否已加载。
我有
$('#MainPopupIframe').load(function(){
console.log('load the iframe')
//the console won't show anything even if the iframe is loaded.
})
HTML
<button id='click'>click me</button>
//the iframe is created after the user clicks the button.
<iframe id='MainPopupIframe' src='http://...' />...</iframe>
有什么建议？
顺便说一下，我的 iframe 是动态创建的。它不会随着初始页面加载而加载。
你可以试试这个（使用jQuery）
$(function(){
$('#MainPopupIframe').load(function(){
$(this).show();
console.log('iframe loaded successfully')
});
$('#click').on('click', function(){
$('#MainPopupIframe').attr('src', 'https://heera.it');
});
});<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<button id='click'>click me</button>
<iframe style="display:none" id='MainPopupIframe' src='' /></iframe>更新：使用普通javascript
window.onload = function(){
var ifr = document.getElementById('MainPopupIframe');
ifr.onload=function(){
this.style.display='block';
console.log('laod the iframe')
};
var btn = document.getElementById('click');
btn.onclick=function(){
ifr.src='https://heera.it';
};
};<button id='click'>click me</button>
<iframe style="display:none" id='MainPopupIframe' src='' /></iframe>更新：你也可以试试这个（动态 iframe）
$(function(){
$('#click').on('click', function(){
var ifr = $('<iframe/>', {
id:'MainPopupIframe',
src:'https://heera.it',
style:'display:none;width:320px;height:400px',
load:function(){
$(this).show();
alert('iframe loaded !');
}
});
$('body').append(ifr);
});
});<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<button id='click'>click me</button><br />我想像这样：
<html>
<head>
<script>
var frame_loaded = 0;
function setFrameLoaded()
{
frame_loaded = 1;
alert("Iframe is loaded");
}
$('#click').click(function(){
if(frame_loaded == 1)
console.log('iframe loaded')
} else {
console.log('iframe not loaded')
}
})
</script>
</head>
<button id='click'>click me</button>
<iframe id='MainPopupIframe' onload='setFrameLoaded();' src='http://...' />...</iframe>
您也可以尝试 onload 事件；
var createIframe = function (src) {
var self = this;
$('<iframe>', {
src: src,
id: 'iframeId',
frameborder: 1,
scrolling: 'no',
onload: function () {
self.isIframeLoaded = true;
console.log('loaded!');
}
}).appendTo('#iframeContainer');
};