vue-directive__自定义指令

1.复制

/**
* v-copy
* 复制某个值至剪贴板
* 接收参数：string类型/Ref<string>类型/Reactive<string>类型
*/
import type { Directive, DirectiveBinding } from "vue";
import { ElMessage } from "element-plus";
interface ElType extends HTMLElement {
  copyData: string | number;
  __handleClick__: any;
}
const copy: Directive = {
  mounted(el: ElType, binding: DirectiveBinding) {
  	el.copyData = binding.value;
  	el.addEventListener("click", handleClick);
  },
  updated(el: ElType, binding: DirectiveBinding) {
  	el.copyData = binding.value;
  },
  beforeUnmount(el: ElType) {
  	el.removeEventListener("click", el.__handleClick__);
  }
};

// 复制到剪贴板:旧方法（已弃用）
// function handleClick(this: any) {
// 	const input = document.createElement("input");
// 	input.value = this.copyData.toLocaleString();
// 	document.body.appendChild(input);
// 	input.select();
// 	document.execCommand("Copy");
// 	document.body.removeChild(input);
// 	ElMessage({
// 		type: "success",
// 		message: "复制成功"
// 	});
// }

// 复制到剪贴板:新方法
function handleClick(this: any) {
  navigator.clipboard.writeText(this.copyData.toLocaleString()).then(() => {
  	ElMessage({
  		type: "success",
  		message: "复制成功"
  	});
  }, () => {
  	ElMessage({
  		type: "error",
  		message: "复制失败"
  	});
  });
}

export default copy;

原文地址：http://www.cnblogs.com/miyagi-jiye/p/16787259.html