我不明白.toString(16)
这段代码的作用 -
var fade = function (node) {
var level = 1;
var step = function () {
var hex = level.toString(16); // ← This part
node.style.backgroundColor = '#FFFF' + hex + hex;
if (level < 15) {
level += 1;
setTimeout(step, 100);
}
};
setTimeout(step, 100);
};
fade(document.body);