[js] 在js中批量设置css样式

function f1(target, styles) {

            for (var k in styles) {
                // target.style[width] = "300px";
                target.style[k] = styles[k];
            }
        }


        var div = document.querySelector("div");

        f1(div, {
            width: "300px",
            height: "300px",
            backgroundColor: 'green'
        });