第三方函数工具库：lodash
安装： npm i lodash
引入：import _ from ‘lodash’
//防抖
testDebounce: _.debounce(function() {
console.log("debounce");
}, 2000, {
leading: true,
trailing: false
})
//节流
testThrottle: _.throttle(function() {
console.log("throttle");
}, 5000, {
leading: true,
trailing: false
})
