index.js
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/* eslint-disable */
/**
* 节流函数
*/
export function debounce(func, wait, immediate) {
let timeout, args, context, timestamp, result
const later = function () {
const last = +new Date() - timestamp // 距上次触发事件间隔
// 上次被包装函数被调用时间间隔 last 小于设定的时间间隔 wait
if (last < wait && last > 0) {
timeout = setTimeout(later, wait - last)
} else {
timeout = null;
// 如果设定 immediate === true, 因为开始边界已经调用了此处无需调用
if (!immediate) {
result = func.apply(context, args)
if (!timeout) context = args = null
}
}
}
return function (...args) {
context = this
timestamp = +new Date()
const callNow = immediate && !timeout
// 如果延时不存在, 重新设定超时
if (!timeout) timeout = setTimeout(later, wait)
if (callNow) {
result = func.apply(context, args)
context = args = null
}
return result
}
}
/**
* @param {object} json
* @returns {string}
*/
export function param2(json) {
if (!json) return ''
return cleanArray(
Object.keys(json).map(key => {
if (json[key] === undefined ||
json[key] === null
) return ''
return encodeURIComponent(key) + '=' + json[key]
})
).join('&')
}