vue项目中使用particles实现粒子背景效果及遇到的坑(按钮没有点击响应)

import VueParticles from 'vue-particles' 
Vue.use(VueParticles) 

<template >
 <div v-loading.fullscreen.lock="loading"
    class="login" 
    element-loading-spinner="fa fa-spinner fa-pulse fa-3x fa-fw">
  <vue-particles
    color="#409EFF"
    :particleOpacity="0.7"
    :particlesNumber="80"
    shapeType="circle"
    :particleSize="4"
    linesColor="#409EFF"
    :linesWidth="1"
    :lineLinked="true"
    :lineOpacity="0.4"
    :linesDistance="150"
    :moveSpeed="3"
    :hoverEffect="true"
    hoverMode="grab"
    :clickEffect="true"
    clickMode="push"
   >  </vue-particles>
  <el-form :rules="rules"
       :model="loginFrom"
       class="logContainer"
       ref="loginFrom"
       @keydown.enter.native="loginSubmit">
   <h2 class="logtitle"><i class="fa fa-drupal fa-2x"
       style="color: #505458" /> 人 事 管 理</h2>
   <el-form-item prop="username">
    <el-input type="text"
         v-model="loginFrom.username"
         placeholder="请输入用户名"
         class="inputbg"
         auto-complete="off">
     <i slot="prefix"
       class="el-icon-user"></i>
    </el-input>
   </el-form-item>
   <el-form-item prop="password">
    <el-input type="password"
         v-model="loginFrom.password"
         placeholder="请输入密码"
         auto-complete="off">
     <i slot="prefix"
       class="el-icon-lock"></i>
    </el-input>
   </el-form-item>
   <el-form-item prop="code">
    <el-input v-model="loginFrom.code"
         auto-complete="off"
         placeholder="验证码"
         style="width: 63%"
         @keyup.enter.native="loginSubmit">
     <i slot="prefix"
       class="el-icon-view"></i>
    </el-input>
    <div class="login-code">
     <img :src="codeUrl"
        @click="getCode">
    </div>
   </el-form-item>
   <el-checkbox v-model="loginFrom.rememberMe"
          style="margin:0 0 25px 0;">
    记住我
   </el-checkbox>
   <el-button type="primary" 
         style="width:100%; position: relative;"
         @click="loginSubmit">登录</el-button>
  </el-form>
 </div>
</template>

 #particles-js{
    width: 100%;
    height: calc(100% - 100px);
     position: absolute;  
  }

<el-button type="primary" 
         style="width:100%; position: relative;"
         @click="loginSubmit">登录</el-button>