您可以在支持它的所有浏览器上捕获事件：

You could capture event on all browsers which support it:

document.addEventListener(
    'load',
    function(event){
        var elm = event.target;
        if( elm.id === 'some_elementid'){ // or any other filtering condition
            // do some stuff
        }
    },
    true // Capture event
);