use-on-demand
Version:
65 lines • 2.24 kB
JavaScript
/**
* 经过调整的，精确的【Interval定时器】
*
* 参考资料：
* https://stackoverflow.com/a/44337628/6264260
*
*/
var AdjustingInterval = /** @class */ (function () {
function AdjustingInterval(interval, workFunc, errorFunc) {
this.interval = interval;
this.workFunc = workFunc;
this.errorFunc = errorFunc;
this.expected = 0;
this.timeout = 0;
}
/**
* 带绑定上下文
*/
AdjustingInterval.prototype._get_step_bind_fn = function () {
// return this.step;
return this.step.bind(this); // WARN 此处，必须绑定【this上下文】；不然之后的方法内获取不到this.xxx
};
AdjustingInterval.prototype.start = function () {
this.expected = Date.now() + this.interval;
this.timeout = window.setTimeout(this._get_step_bind_fn(), // 带绑定上下文
this.interval);
};
;
AdjustingInterval.prototype.stop = function () {
window.clearTimeout(this.timeout);
};
;
AdjustingInterval.prototype.step = function () {
var drift = Date.now() - this.expected;
// 漏掉了时间
if (drift > this.interval) {
// console.log('漏掉了时间');
// You could have some default stuff here too...
if (this.errorFunc)
this.errorFunc();
}
else {
// console.log('正常运行');
}
// 执行程序
this.workFunc();
this.expected += this.interval;
this.timeout = window.setTimeout(this._get_step_bind_fn(), // 带绑定上下文
Math.max(0, this.interval - drift));
};
return AdjustingInterval;
}());
var xX_STimer_Helper = /** @class */ (function () {
function xX_STimer_Helper() {
}
xX_STimer_Helper.accurateInterval = function (interval, workFunc, errorFunc) {
var adjustingInterval = new AdjustingInterval(interval, workFunc, errorFunc);
adjustingInterval.start();
return adjustingInterval;
};
;
return xX_STimer_Helper;
}());
export { xX_STimer_Helper };
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