Question

我尝试在用户点击按钮时启动功能。

此时它会在加载网站时以及用户滚动或调整浏览器大小时启动。但是，当用户点击特定按钮时，如何让它工作。在妈妈的按钮上有一个onclick =＆＃34; sort（）;＆＃34;。

var lazy = [];
registerListener('load', setLazy);
registerListener('load', lazyLoad);
registerListener('scroll', lazyLoad);
registerListener('resize', lazyLoad);

document.getElementById('sort').addEventListener('click', function() {

});

function setLazy(){
    lazy = document.getElementById('img-loading').getElementsByTagName('img');
    // console.log('Found ' + lazy.length + ' lazy images');
} 

function lazyLoad(){
    console.log('lazyLoad initiated');
    for(var i=0; i<lazy.length; i++){
        if(isInViewport(lazy[i])){
            if (lazy[i].getAttribute('data-src')){
                lazy[i].src = lazy[i].getAttribute('data-src');
                lazy[i].removeAttribute('data-src');
            }
        }
    }
    cleanLazy();
    console.log('lazyLoad END');
}

function cleanLazy(){
    lazy = Array.prototype.filter.call(lazy, function(l){ return l.getAttribute('data-src');});
}

function isInViewport(el){
    var rect = el.getBoundingClientRect();

    return (
        rect.bottom >= 0 && 
        rect.right >= 0 && 
        rect.top <= (window.innerHeight || document.documentElement.clientHeight) && 
        rect.left <= (window.innerWidth || document.documentElement.clientWidth)
     );
}

function registerListener(event, func) {
    if (window.addEventListener) {
        window.addEventListener(event, func)
    } else {
        window.attachEvent('on' + event, func)
    }
}

Answer 1

var button=document.getElementById('button'),
    clickFunction=function(button){
      alert('click');
    };

button.addEventListener('click',clickFunction);

<input id="button" type="button" value="test">

试图启动功能

1 个答案: