2018-12-03匿名函数

window.onload = function(){
    var odiv = document.getElementById('div1');
    odiv.onclick = function(){
        alert('Hello');
    }
}

• 一个没有函数名的函数就是匿名函数

函数传参

<script type="text/javascript">
window.onload = function () {
    var a = document.getElementById('div1');
    
    function changeStyle(styl,val) {
        a.style[styl] = val;
    }
        changeStyle('color','red');
        changeStyle('background','gold');
}
</script>

return关键字

 window.onload = function () {
        input01 = document.getElementById('input01');
        input02 = document.getElementById('input02');
        btn = document.getElementById('btn');

        btn.onclick = function () {
            var val01 = input01.value;
            var val02 = input02.value;
            var result = add(val01,val02);
            alert(result)
        };
        function add(a,b) {
            var c = parseInt(a)+ parseInt(b);
            return c;
        }
    }