63 lines
1.2 KiB
TypeScript
63 lines
1.2 KiB
TypeScript
/**
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* 获取 top 属性值
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* <p>
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* @param elem dom
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* */
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export function getTop(elem: any) : any {
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return (
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elem.offsetTop + ((elem.offsetParent && getTop(elem.offsetParent)) || 0)
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);
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}
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/**
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* 获取 left 属性值
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* <p>
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* @param elem dom
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* */
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export function getLeft(elem: any) : any {
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return (
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elem.offsetLeft + ((elem.offsetParent && getLeft(elem.offsetParent)) || 0)
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);
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}
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/**
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* 事件绑定
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* <p>
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* @param elem dom
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* @param events 事件
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* @param handler 事件回调
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* */
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export function on(elem: any, events: any, handler: any) {
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[]
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.concat(events)
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.forEach((event) => elem.addEventListener(event, handler, false));
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}
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/**
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* 单次事件
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* <p>
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* @param elem dom
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* @param events 事件
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* @param handler 事件回调
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* */
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export function once(elem: any, events: any, handler: any) {
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const listener = function (_this: any, args: any) {
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handler.apply(_this, args);
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off(elem, events, listener);
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};
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on(elem, events, listener);
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}
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/**
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* 事件解除
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* <p>
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* @param elem dom
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* @param events 事件
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* @param handler 事件回调
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* */
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export function off(elem: any, events: any, handler: any) {
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[]
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.concat(events)
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.forEach((event) => elem.removeEventListener(event, handler, false));
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}
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