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position:sticky的vue组件化和兼容性解决

时间:2019-12-30 13:16:04      阅读:374      评论:0      收藏:0      [点我收藏+]

封装

<template>
    <div class="header_sticky">
        <slot></slot>
    </div>
</template>
<script>
export default {
    name: ‘stickyHeader‘,
    computed: {
        randomId: function(){
            return ‘randomId_‘ + Number(Math.random().toString().substr(3,3) + Date.now()).toString(36);
        },
        targetElement_: function() {
            return this.$el
        }
    },
  mounted() {
   //获取高度变化
    this.$refs.sticky_.sticky() 
  }, methods: { // css: 用于替换的css样式; (一般用默认的) sticky_(css=‘sticky_‘) { if (CSS.supports(‘position‘, ‘sticky‘) || CSS.supports(‘position‘, ‘-webkit-sticky‘)) { console.log(‘>>>>>>>>> sticky is supported‘) } else { let newNodeTop; let header = this.targetElement_; if(document.getElementById(this.randomId)) { newNodeTop = document.getElementById(this.randomId); }else{ newNodeTop = document.createElement("div"); newNodeTop.id = this.randomId; header.parentNode.insertBefore(newNodeTop, header); header.classList.add(css); } setTimeout(() => { let height = header.offsetHeight + 1; //高度 + 1 以防有小数点 newNodeTop.style.height = height + ‘px‘; }, 0) } },
    watch: {
      oldToNew(newVal, oldVal) {
        if(newVal.length !== oldVal.length) {
          this.$refs.sticky_.sticky()
        }
      }
    }, } } </script>
<style scoped>
.header_sticky {
    width: 100%;
    position: sticky;
    position: -webkit-sticky;
    top: 0;
    z-index: 100;
    transition: height 1s;
    -moz-transition: height 1s;
    -webkit-transition: height 1s;
    -o-transition: height 1s;
}

.sticky_ {
    width: 100%;
    position: fixed;
    position: -webkit-fixed;
    top: 0;
    z-index: 100;
}

</style>




使用


  
<sticky-header ref="sticky_">
    <!-- contents -->
</sticky-header>
 

position:sticky的vue组件化和兼容性解决

原文:https://www.cnblogs.com/zjxiang008/p/12118776.html

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