保护代理
<script>
function sendMsg(msg) {
console.log(msg);
}
function proxySend(msg) {
msg = msg.replace(/XT/, '');
sendMsg(msg);
}
proxySend('XT,辛苦的码农')
</script>
虚拟代理
<!-- scroll, resize,keyup 等事件频繁触发会引起卡顿 -->
function scrollHnader(name,age){
console.log('屏幕滚动了');
}
function debounce2(fn,delay){
delay = delay || 300;
if(fn.id){
clearTimeout(fn.id);
}
fn.id = setTimeout(function(){
fn();
},delay);
}
window.onscroll = function(){
debounce2(scrollHnader.bind(this,'laney'),500);
}
缓存代理
function add(){
var arg = Array.from(arguments);
return arg.reduce(function(a,b){
return a+b;
})
}
var proxyAdd = (function(){
var cache = [];
return function(){
var arg = Array.from(arguments).join(',');
if(cache[arg]){
return cache[arg];
} else {
var ret= add.apply(this,arguments);
cache[arg] = ret;
return ret;
}
}
})();
var k1= proxyAdd(1,2,3,4)
proxyAdd(10,20,30,40)
proxyAdd(10,20,30,40)
proxyAdd(10,20,30,40)