1.使用css实现

.no-copy {
    -webkit-touch-callout: none; /* iOS Safari */
    -webkit-user-select: none; /* Safari */
    -khtml-user-select: none; /* Konqueror HTML */
    -moz-user-select: none; /* Firefox */
    -ms-user-select: none; /* Internet Explorer/Edge */
    user-select: none; /* Non-prefixed version, currently supported by Chrome and Opera */
}

2.使用js

<template>
   <div class="app">
     <p> 11111111111111111111111111111111111111111 </p>
   </div>
</template>
<script>
  export default {
    created() {
      this.$nextTick(() => {
        // 禁用右键
        document.oncontextmenu=function(){return false;}
        // 禁用选择
        document.onselectstart=function(){return false;}
      });
    }
  };
</script>

3.禁止el-input输入框复制粘贴

@paste.native.capture.prevent
@copy.native.capture.prevent
@cut.native.capture.prevent

<el-input
  v-model="input"
  @paste.native.capture.prevent="handleFalse"
  @copy.native.capture.prevent="handleFalse"
  @cut.native.capture.prevent="handleFalse"
  :autosize="{ minRows: 4, maxRows: 10 }"
  placeholder=""
  type="textarea"
  ref="input"
></el-input>
    
//方法
handleFalse() {
	//终止
	return false;
}