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56 lines
1.3 KiB
56 lines
1.3 KiB
/** |
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* @desc 函数防抖 |
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* @param func 目标函数 |
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* @param wait 延迟执行毫秒数 |
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* @param immediate true - 立即执行， false - 延迟执行 |
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*/ |
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export const debounce = function(func, wait = 1000, immediate = true) { |
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let timer; |
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console.log(1); |
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return function() { |
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console.log(123); |
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let context = this, |
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args = arguments; |
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if (timer) clearTimeout(timer); |
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if (immediate) { |
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let callNow = !timer; |
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timer = setTimeout(() => { |
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timer = null; |
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}, wait); |
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if (callNow) func.apply(context, args); |
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} else { |
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timer = setTimeout(() => { |
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func.apply(context, args); |
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}, wait) |
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} |
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} |
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} |
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/** |
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* @desc 函数节流 |
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* @param func 函数 |
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* @param wait 延迟执行毫秒数 |
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* @param type 1 使用表时间戳，在时间段开始的时候触发 2 使用表定时器，在时间段结束的时候触发 |
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*/ |
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export const throttle = (func, wait = 1000, type = 1) => { |
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let previous = 0; |
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let timeout; |
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return function() { |
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let context = this; |
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let args = arguments; |
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if (type === 1) { |
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let now = Date.now(); |
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|
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if (now - previous > wait) { |
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func.apply(context, args); |
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previous = now; |
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} |
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} else if (type === 2) { |
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if (!timeout) { |
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timeout = setTimeout(() => { |
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timeout = null; |
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func.apply(context, args) |
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}, wait) |
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} |
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} |
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} |
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}
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