/**
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* v-longpress
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* 长按指令，长按时触发事件
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*/
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import type { Directive, DirectiveBinding } from "vue";
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const directive: Directive = {
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mounted(el: HTMLElement, binding: DirectiveBinding) {
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if (typeof binding.value !== "function") {
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throw "callback must be a function";
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}
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// 定义变量
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let pressTimer: any = null;
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// 创建计时器（ 2秒后执行函数 ）
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const start = (e: any) => {
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if (e.button) {
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if (e.type === "click" && e.button !== 0) {
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return;
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}
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}
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if (pressTimer === null) {
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pressTimer = setTimeout(() => {
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handler(e);
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}, 1000);
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}
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};
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// 取消计时器
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const cancel = () => {
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if (pressTimer !== null) {
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clearTimeout(pressTimer);
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pressTimer = null;
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}
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};
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// 运行函数
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const handler = (e: MouseEvent | TouchEvent) => {
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binding.value(e);
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};
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// 添加事件监听器
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el.addEventListener("mousedown", start);
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el.addEventListener("touchstart", start);
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// 取消计时器
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el.addEventListener("click", cancel);
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el.addEventListener("mouseout", cancel);
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el.addEventListener("touchend", cancel);
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el.addEventListener("touchcancel", cancel);
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}
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};
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export default directive;
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