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ithrottle

v1.1.5

Published

js函数节流

Downloads

41

Readme

what's this

这是一个简单的javascript 工具库,可以用来方便你控制函数执行的频率;

how to use

npm i ithorttle;

throttle-以固定的频率执行函数

使函数原本不定时、频繁地调用转成按固定频率执行。

let throttle= require("ithrottle").throttle;
let foo     = function () {
    console.log("foo");
};
/**
 * 函数foo的调用间隔时间为2000ms
 */
let wrapFoo = throttle(foo, 2000);
// wrapFoo每200ms会被调用一次,函数foo实际每2S才执行一次
setInterval( ()=>wrapFoo(), 200);

debounce-延迟执行函数

延迟执行函数,在指定的延迟时间内,再次调用函数会重新计算延迟时间。

let debounce= require("ithrottle").debounce;
let bar=function(){
  console.log("bar");
  console.log(Date.now()-startTime)
};
/**
 * 函数bar延迟2000ms执行
 */
let wrapBar=debounce(bar,2000);
let startTime=Date.now();
wrapBar();
/**
 * 1000ms后调用,bar会再等待2000毫秒执行
 */
setTimeout(wrapBar,1000); 

API

throttle

  • arguments

    • {boolean} immediate=false ,为true则首次调用立即执行;
    • {boolean} leave=false ,为true则忽略指定延迟时间内的调用;
    • {boolean} promise=false ,为true则执行后返回Promise。
  • return

    • {function} clear, 取消还末执行的函数。

debounce

与throttle相同