console 命令行工具 X clear

console

// var button = document.getElementById('save')

// button.onclick = function () {
//     var throttleFun = throttle(1000, fun)
//     throttleFun()
// }

// function fun() {
//     console.log('Hello')
// }

// function throttle(delay, callback) {
//     var timer

//     return function () {
//         if (!timer) {
//             timer = setTimeout(function () {
//                 callback()
//                 timer = null
//             }, delay)
//         }
//     }
// }


var save = document.getElementById('save')

var throttleFun =  throttle(1000, fun)

save.onclick = function () {

   throttleFun()
}

function fun () {
    console.log('保存')
}

function throttle (delay,callback) {
    var timer;
    return function () {
        if (!timer) {
           timer = setTimeout(function () {
               callback()
               timer = null
            }, delay)    
        }
    }
}

<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=, initial-scale=">
	<meta http-equiv="X-UA-Compatible" content="">
	<title>节流函数的理解</title>
</head>
<body>
	<button id='save'>保存</button>
</body>
</html>