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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 | 1x 1x 1x 22x 11x 1x 3x 3x 1x | /** * 包装为规律触发的函数,用于降低密集事件的处理频率 * - 在疯狂操作期间,按照规律时间间隔,来调用任务函数 * @method setRegular * @param {Function} fn 要延迟触发的函数 * @param {Number} delay 延迟时间(ms) * @param {Object} [bind] 函数的 this 指向 * @return {Function} 经过包装的定时触发函数 * @example * import { setRegular } from '@spore-ui/tskit'; * const comp = { * countWords() { * console.info(this.length); * } * }; * comp.regularCount = setRegular(comp.countWords.bind(comp), 200); * // 疯狂按键,每隔 200ms 才有一次按键有效 * $('#input').keydown(() => { * comp.length = $('#input').val().length; * comp.regularCount(); * })); */ import { TypeInterval } from '../types'; export function setRegular(fn: Function, delay: number): Function { let enable = true; let timer: TypeInterval = null; return (...args: unknown[]) => { enable = true; if (!timer) { timer = setInterval(() => { if (typeof fn === 'function') { fn(...args); } if (!enable) { clearInterval(timer); timer = null; } enable = false; }, delay); } }; } export default setRegular; |